You could open a scam accusation if you want, but have you actually been scammed? You got the account you paid for, right? And how do you know what other accounts he has? If you do post them please provide evidence so people don't neg-rep somebody elses ones. Those could end up in the same or similar position to you are now.
The issue is that this account has been tainted with negative rep and it was revealed by Quickseller to the public that this account has been purchased (breaching the agreement). Furthermore, if bayuo is telling the truth (although I doubt he is), Quickseller further breached the agreement by telling me this was not a hacked account. He assured me that it would be problem-free.
I wanted this account for signature advertising. With the amount of negative rep it is receiving, it is making it worthless.