The user owes me 25k and I lost over 2k because bank fees. They either pay me back or you deal with them please help.

I wanted to invest in bitcoin to make extra income by finding a user on FB and connected with Whatsapp. I made the trade and had a withdrawal for 25k , but I had to pay a 15% commission first. Then I made a deal and said I couldnt afford it needed it to get my withdrawal to payback. Now i got bills to pay and lost money for nothing. I was very patient of the user , but i just want my funds back, please. I know I made the wrong decision with this user. He costingybjob and family. It led to not having gas to go to work.