Revoke Withdrawals with make excuses

NXG has revoke my withdrawal and not giving to me my profit with saying that i have done external hedge. i even also ask them for proof of external hedge because i don't have even know about this hedge. i made many entries in different dates i also get many loss in these trades also that they are saying of hedge. actually they just make excuses to revoke my profit because they are scammers. i just received 300$ withdrawal. after that the other withdrawal, they are not giving any response to me through email i have contacted several times but in vain.