None service delivery

The is a guy named mitch that comes as a very sweet man but ****s people he came to my house as someone who is coming to fix the car then decided to take another route he said 70% of the money must be sent so I sent him the 70% then next thing he decides not to fix the car he blocked me he blocked my numbers I can't get hold of him if there is a chance for him to just pay back the 3800 he took from me then we will be even he even has my car keys because he promised he will fix it but now he is talking about sueing me because I wrote a review on his work page of the experience he is giving if he can fix my car it's OK but he is doing nothing but has a very bad way of talking to me