Item won but they don't want it,

[Fluffycloudland77]

As they bid on the wrong top.

So how do I get out of it without paying fees? Unpaid item case?

yes - open an unpaid item case in 2 days - it is the only guaranteed way of getting fees back - plus they can't leave feedback either. And add them to blocked bidder list too.

Right, thank you.

The bidders saying I should cancel the transaction now and the seller fees get refunded instantly?

only if they agree to the cancellation, if they refuse it you don't get your final fees back, plus they can still leave feedback.