... Basically what happened here is that you sent a payment directly to the scammer. Coinpayments doesn't actually control the keys here.
Basically if I had not been misleaded by the coinpayments.net payment gate (and as an ordinary person I had the right to think that the participation of a third party is primarily necessary to protect the transaction from fraud and not just for technical convenience of shop's employees) I would have never bought anything directly from those damn scammers