They scam you by buying some top-up card(mycard) from other webpage, and telling you that you need deposit an amount in order to complete the purchase.
So happen when you deposit, and they say they have to refund you first before doing the transaction by putting your bank account number and every personal details which is not gonna work. They will tell you that your deposit is frozen because you have put the wrong information.
So they replied you later and said that in order to unfroze the frozen deposit, you have to deposit another $800USD to remain unfrozen. If you are dumb enough to put $800USD in, they might repeat the same thing over and over again so that they can earn all the money you have put in and soon you will give up.
As you give up and wanting to call the bank that you lost the money, it’s all your fault to believe that all is real. So please when you see good deal it might not be real.