FRAUDULENT ACTIVITIES OF BINARY DERIV

I have 761$ in my deriv trading account and now after bringing proves that I made payments with my friends card, they decided to send me this receipt after much pressure on them stating that the are refunding me only $100.please how can I sue this company.they are fraudulent.the didn't reject my payment when the saw I used my friends account, immediately I wanted to withdraw the now asked me about the people I used their cards which I provided evidences.now the are refunding only $100