I made an exchange with him and he sent the funds twice as BTC exchange and my account got frozen.
BTC is against Venmo user agreement, now I am unable to do anything with the account

Here is the link: https://help.venmo.com/customer/portal/articles/651173
and here is the email I received 2 hours after he sent me the payment:

I will be opening a scam thread for the buyer and also posting on the scam thread he opened against me