I gave my car for service and paid but they are not fixing it nor returning it. What can I do?

Hello

I have a question about a problem I am facing. I had given my car for service to a person, but the car had a major issue and needed parts to be replaced. I had paid him the agreed money too.

It's been 4 months since he took the car and he has not returned the car. the car is in his garage. his excuse is that the spare parts are not available. He is not returning my money or the car.

What actions can I initiate against this person and the garage?

Kindly advise.

A. C.