COSS Broker Review

I invested in this platform the considerable sum of 1488$, they sent me an email with the password that they give you, and so it was, after that I entered and I had my money, after that I made operations in the market and I did very well, I won more than 6500$, I proceeded to withdraw and it is there when they did not pay me they asked me for a QR code and it does not work.