missprim - I did read your post properly. It makes no difference whether you buy with a bid on an auction or "Buy It Now", the same EBay procedures, and the term "bid", apply to both. As another example, you will have received an email confirming that you "won" the item, which is also a universal term not normally associated with buying from Argos.
Please accept all this advice in the spirit in which it is offered. You asked for help and that is what is being offered.