There is no connection on the users above and the user Akash8871 that scammed you. By reading the PM you provided, bitcoin31 is feeling an extortion is going on against him. Please if you are accusing bitcoin31 to have scammed you as an alt of Akash8871, that is false. He wanted to send you money to remove your red trust, not because he belief he scammed you. Am i missing something?
But Timelord2067 said that these users are connected to Akash8871 and bitcoin31 wouldn't offer me money to just remove the trust rating unless he was guilty. The fact he is not replying back means that he is guilty of the scam or may be he is not Akash8871 but still it makes him look like a scammer. One night before he was begging me to remove the rating and next day he just disappears.
I don't get the extortion thing. I did not force him to pay me back but he instead said he would pay me back the amount I was scammed of as he believed he won't get paid from his campaign. Don't you find that shady?
I still am not convinced that he was not that Akash but if he is not, then I'm wrong. However, I won't remove that trust rating from his account as he already has proven he is a cheat.
Both Shorena and TimeLord have clarified there is no connection evidences between bitcoin31 and Akash8871
The user PMd you felt IMO to offer you money as long as the neg rep would be removed. The fact he didnt really send you money might be him rethinking about it. IMO if you persist to ask him the money that another user scammed you (without proving it was actually bitcoin31) might be an extortion attempt under the threat of a neg rep, just to gain back what you been scammed, from whoever.