Are you making a joke out of poor taste, or is this honestly something you believe to be the circumstance?
actmyname left you a negative trust for "Auctioning off account for rent." :
https://archive.is/HjpVDAccount trading is frowned upon and generally results in negative trust that stands. You could try speaking with actmyname, but if you attempt to bribe them or accuse them of holding your reputation ransom then I doubt it will end well. Why would someone want to rent a forum account here for any purpose other than scamming on it and leaving the owner holding the bag?
I am also giving you another one as you trying to buy positive feedback.
Where is this user attempting to buy positive feedback? Unless you mean their attempt to pay for the removal of a negative.