to not pay for an item I haven't received?

[Tittybiscuit]

I used the site Vinted recently to buy an item for my dsil for Xmas.
As the item was over what I would normally spend on the site (15.00) I paid for it to be sent royal mail 2nd class tracked at a cost of £3.80.
The seller claimed to have sent the item a few days later, but failed to give me the barcode to be able to track.

As this wasn't done, Vinted policy is to refund me the full amount and leave negative feedback for the seller due to non-postage.
The seller has since sent me a message showing a receipt to my address, but for an amount of £2.80. Therefore, not tracked as requested.
She has requested that I pay her for the item anyway and is annoyed that I won't do this and has been contacting me since the middle of Dec, with increasingly rude messages, basically calling me a liar and asking for my address.
I have suggested that she contact Vinted again to make a claim for a lost item, and instead has continued to message me for payment.
AIBU to refuse to a) pay her and b) refuse to have any more contact with her?

I'm not familiar with how Vinted works, but if she has proof of postage she can make a claim for up to £20 with Royal Mail.

Her fault for not sending it recorded delivery, really.

I use vinted. Leave it to them to sort but keep a record of her messages, they are quite good at sorting things and will decide what's best

YANBU, don't give her your address!

Don't reply and forward all her messages on to Vinted, she's fucking harassing you.

Nightmare.

I know nothing about Vinted. However, assuming it's a site like eBay or Amazon, I'd message back one more time to say you have advised her that this matter should now in the hands of site admin and you will no longer be responding to any direct messages from her. If she can't be arsed to use their customer support, her problem not yours.

Also if you bought the item and she "posted" it, she will have your address

This doesn't quite make sense. I assume you mean you paid for royal mail 2nd class signed for? You do not get a tracking number for second class services. The proof is the signature on delivery. Is the receipt she messaged you the electronic signature which proves delivery to your address.
Did you receive the item regardless of the postage method used?

Like TobleroneBoo said, won't she already have your address?

I've seen a picture of a receipt... I'm not disputing something has been sent. My issue with her is that I understand she will be frustrated- but I didn't cancel the transaction, Vinted did. I actually said I would be happy to wait a few more days... apparently this is not policy. Quite refreshing actually.
I have said that she should have my address, that I am not willing to give her it again and she should contact Vinted.

She's called me a darling liar and said that she has proof of delivery from royal mail?! fucking crank

Sorry, Moving15 cross post.
I paid for the item to be delivered 2nd class signed for.
She has not sent it this way and because she has been unable to provide a tracking number, Vinted have cancelled the transaction automatically.
I haven't received the item. I've checked with the sorting office as I've had to go for other parcels over Xmas, but they don't have anything for me

Well if she didn't send it signed for she won't have proof it was delivered. As Vinted have cancelled the transaction she shouldn't be contacting you. As a PP has already said her only recourse is compensation from Royal Mail, unless the item turns up of course!
Click 'spam' on your inbox!

You do get a tracking reference with 2nd class
Signed for. If she had accidentally sent it not signed for, she can speak with vinted and as long as you receive item vinted can release funds but if she won't speak with them it's her loss

Thanks all... just checking that I wasn't being completely unreasonable.
If she has genuinely sent it then I do understand the frustration, but as I explained to her, the cost of the item isn't an amount I'd spend on a second hand site, which is why I paid for the additional postage.
I think I'm more annoyed to have been called a liar.

I would be annoyed at being implied to be a liar too.

You paid for the postage, she cannot provide a tracking number, and as such she has breached the terms of the sale. I'm not familiar with Vinted, but it sounds like they are handling it well.

Tell the seller to stop harassing you and instead tell her speak to Vinted.

the sender needs to claim a missing parcel not the receiver.
So may people lie about missing parcels which is why some people do think you are lying if one does generally go missing, although she should not be harrassing you lik that

£2.80 is second class small parcel rate.

Second class small parcel signed for is £3.90, IIRC.

If she has proof you received it, where is that proof? Particularly as she didn't track it.
Keep reporting it to the company. And if it becomes abusive, report to the police.

If she's got something that shows receipt at your address, then doesn't that show the address?

Just looked.

Much better prices (for the seller) than Ebay. Is it because the items are better quality (on the whole)?