I think it's too late for bestchange monitor to cancel the partnership with go-go scam exchanger after deceiving users about it being a No KYC exchange even if the exchanger lies to them too. Bestchange bear a part of responsibility of your loss imo and should do its best to refund you because you were directed to that scam trip through their service which you trusted.

Because even if we admit you mistaken not checking the TOS before sending that amount exceeding the max limit, it turned out later that another version of the Tos (Russian) doesn't contain that condition.