I read the first few posts and jumped to a mini quest, intrigued if my scam-hunting nose is rusty or the radar is still working, so I decided to take some fun and a small break from the usual activity I do in SA...
First, it is safe to establish that he's a bounty hunters, so I searched in the few bounty channels, and... the TG handler of Alfy that contacted you happened to be @alfy675?

same pictures with the one in your opening post.
Though at this point, it's a hearsay at best, not to mention that he "wiped" his data clean and keyword @alvy657 seemed to bear
zero result in ninjastic, or that he never use it, only recently. So... there goes the way to get to the forum username. But fret not. He's a bounty hunter. It means, he's active in many bounties, so I visited several bounty channels, and... [drum roll] taadaa...

So we know that that the username is
spark22, and the hearsay now got a ground, a shaky one, still circumstantial and not a smoking gun yet, but that's a start. So we dig deeper: [1] username spark22, [2] in
limocoin bountyAnd there we go, using the tg handler @Tania462, of which... the first time he use before changing to alvy when he reached you? Smoking gun enough?
Then I swiped
this thread, and found that LMF has launched her own research and our separate investigation brought us to same name:
[...]
Telegram Profile Url:
https://t.me/Tania462
LimoCoin Official group Url:
@fillippone, such coincidences are rare

Never... ever... ever... make my GazetaBitcoin's favorite person pissed.