scams take profits and capital of customers

My name is THANH have an account on octa Fx mt4 20822676. Since I am trading on this market I know octaFX is a good exchange so I invested a total amount of $6742. I have been trading from 09/26/2022 until now for a long time and am also a loyal customer of octafx. so far when i trade with losses and deposit continuously, octaFX doesn't say anything and always welcomes me. and after some bad luck i was lucky to trade with a profit of around $8000 then octaFX made ridiculous excuses saying i was wrong in the trade but didn't point out i was wrong what . Is it wrong for me to trade at a loss and trade with a profit? and another absurd thing is that octaFX has locked mt4 and also my login page and won't let me withdraw my funds. I'm really upset with octaFX's treatment like a scam exchange.