Mycoin Auction doesn't give money back.

Once you inserted capital they make it impossible for you to withdraw (to sell coins). I wish I had reading material on this company before committing to the investment. They stole my whole savings and I can't get it back. I feel it is unfair. They said you would make money on your initial capital, now I'm stuck... Had to insert 20% to get initial capital out but it still doesn't work. Could someone please do something or help me?