Cancel and get a refund. Terms aren't updated because the seller is looking for an interest-free loan from you without first informing you what she/he is doing. May in fact be a VMP owner or employee.
@IMGodzilla yep that's exactly it. I said cancel and then they said oh can you give me couple days and I'll go the post office when its not so busy or do you still wanna cancel. I said of course I can wait a couple days that's not unreasonable at all but i aint waiting 3 weeks or more with no definite date I'll just buy elsewhere lol
To be fair the same thing happened to me as a seller (and a PIFer - poor @uvwxVinyl is still waiting for a pif from me but has been very patient). I quickly emailed to tell the buyer (before issuing an invoice) I would post but at the end of the week when I went out to buy some essentials or could refund straight away. To wait until payment before saying that is such a bad thing to do though!