Payoneer complaint: I complain but not got refund

Hi,
I want to submit a legal dispute against the payoneer.
I got scammed on a payoneer of 4012$. I called them about it. The moderator said that the scammer withdrew 100$ and another amount is still in his account. We will freeze it and refund you. But I got an email from them that we will not do that contact with your sender to send back to.. I said how it is possible they scam me and how they reply to me.
I got scammed on a facebook group. Admin of the group deals with me to send money to his payoneer and he will send exchanged money to my bank account. But after sending on his payoneer he blocked me from his group and fb id. I thought money would be sent to the payoneer and the payoneer will help me to refund. But payeer said we will not refund you.. they have all the stuff. Scammer payopeer account. Which bank account he added to his paypneer account. Whish phone number he is using which ip he is using hey do not help me. It looks scammer are part of payopeer as they are not listening me and not refunding my money. I have all prove that I send money to payoeer and got nothing. Even they are bale to investigate what scammer send me instead of 4012$.
I am attaching all proves please help me
MUhamamd Naizm Kanju