To think this pizza shop has been a bastard

[Pancake2015]

I made an order on just eat. I i receive a phone call saying the special offer i clicked on was 'wednesday special' and its thursday.
Genuine mistake. I looked at the special offers, not the title. I also expect that everything on the menu is available to purchase as it is.
I ask what to do and they tell me to cancel it and re order it - i hoped they would have suggested i make up the cost with cash in hand.
So now i have cancelled, and paid an extra £4 since the offer cannot be used. If it was just me id of said stuff it, but the kids were/are really looking forward to the treat!

Aibu to think offers for specific days should only be accessible on that specific day?

I have paid out £18 for nothing tonight with no clue as to when that money will return to me.

The money should be refunded automatically because the initial order was cancelled. That would be why they couldn't just take the £4 from you at the door. They would have no way of cancelling the order and keeping the money you already paid.

If I was the pizza shop I'd probably have sucked up the loss and called you to say technically it's not valid today but I'll let this one go. After this I bet you won't be using that pizza place in a hurry. I hope the £18 gets back to you soon.