Cash App complaint: Fraud Scam

Person contacted me about an opportunity for relief during the pandemic, person stated I give him $200 via cash app or gift card I would indeed receive in return $2400 within minutes of this transactions, person stated after this transaction was completed by me (meaning I send him my $200 which I have for evidence) person then tells me that I must send him an additional $450 for the government fees , he stated he will send documentation to support this , person could not produce that information I immediately asked scammer to please return my funds , scammer begged and pleaded to try and send additional money I explained that information was not told to me if so I would have made that decision scammer refused to return my $200 I requested through cash app but was denied please help stop this scammer bum from doing this to other vunderable people