I'm extremely sorry to you, it's a great loss. Too bad you entrusted funds to a site that doesn't even list a legal entity.

You were right to contact law enforcement. I would advise you to find experts in the field of cryptocurrency crime investigation to help you block the funds before the attackers withdraw them from the exchange. For example in CIS I know that https://amlbot.com/reclaim-crypto provide such services.

I used some OSINT to find the info: Their usernames:
@AlexGamnit
@Sara_opy
@danielsup
@Aaron_supp

The first contact is the channel administrator https://t.me/chatbotsbusiness, because he can be found in members with the badge "Oxypay Support".

Also I know that @AlexGamnit uses a Telegram private number that starts +888, it can be checked on Fragment. His number is +88802570961, you can add him to the contacts and check that this number binded to @AlexGamnit profile. You can find all transaction with it here https://fragment.com/number/88802570961, his TON address is https://tonviewer.com/EQCnH9BYo9B7Wf96e70j6DBqypCfYiib6FHIQBMVz67985Tq. I checked all purchased private numbers and found @Aaron_supp on +88801532796.