Capstone fraud through bonus

I learned through Capstone’s public account that they have bonus promotion. I deposited USD10,000 and they gave me USD2,500. As a result, my account was quickly liquidated. After my time of thinking, I found that recently many customers of Capstone having been deceived. I felt that I was scammed by Capstone with a high amount of bonus. They induced me to deposit, and giving me the rebate was to eat up my principal. Please return my principal of USD10,000.