Someone bid. Pushed up the price. You didn't pull out. You won the auction. You didn't do any action to deny winning the bid, inaction isn't cancelling BTW. You put a block on your bank for the charge. I'm assuming you didn't communicate with the entity that put up the listing. I'm assuming you just didn't actively deny receiving shipment of the auction win and that you just never picked it up or you got the package and tried to return to sender? I'm also then assuming you then communicated with eBay that you want your banking information removed while you had an outstanding charge on your account because you put a bank block on the charge of the win of the auction... Fast forward a year later and they got fed up with your shit and they just charged you again.
You don't have to make your case to me you just have to put more details in here to actually make it seem like what you said was what happened because there's too many details missing here so I have to make assumptions about your actions in the interim between other actions.