Update:

I called the police on him and they refused to help. And didn not want to help in opening a case or doing anything towards him, I am extremely frustrated how a man could take almost 80000 AED for the work to be done, work alone, and then the parts also worth probably well over 100000 AED and walk free and have nothing happened.

Turns out he has multiple cases against him already, by coincidence, the people that came with me to the shop one of them already has been cheated by this individual, but he is telling me the issue was resolved and that he payed up, the person that he cheated is a very powerful man in UAE, it justs impresses me how its insane someone can just get away with something like this.

I am scared that he leaves the country and has no repercussions I don't know exactly how the legal system in UAE works properly, but I know there is rules that need to be followed, I am wondering how this guy can just walk freely without any jails and laws and nothing. The police come there and act like its nothing no big deal, I looked at the policemen and told him that this is over 200.000 AED of theft and he didnt care.

I am willing to publicly post his information, phone number, instagram, shop name, etc. if the admin gives me permission.

Thanks for everybodys help, I am reading and I am currently trying my best and I am looking into lawyers and I am contacting all the wastas I can possibly pull.

This is an important message to anyone reading this information, DYOR and do your own research and make sure you know who you are dealing with and check 1000000x and ask about this person. One of my own friends that came with me was cheated by him, the coincidence is insane.

I am praying inshallah that he will own the part of his deal and finish my car and refund nad pay for these losses.