I bought a t shirt worth 3£ and paid postage 3£ from vinted , sender said she sent it next day with evri and I got the the tracking number . It’s been stuck in transit for 3 weeks now , 2 weeks ago I got a fee to pay card , saying sender didn’t pay enough postage . I have to pay 7£ more to get it delivered ! Is this fair ? Can I refuse it and they will send it back to her or will I still have to pay for it for sending it back to sender ? Thanks for any advice