Sorry to hear you have losed but you didn't verified that group is real or fake. According to your screenshots you enter on fake group/channel. This is his real channel :
https://t.me/tradingcryptocoach more then 268K member and there is no such as offer I can see. You joined channel have 3K subscribers. So obviously you joined fake channel. Even his VIP channel only 1.8K subscribers as far as I know.
Don't handover your fund to others and don't be too much greedy. I don't believe any pump & dump channel.