Highends Auto Service dont want to give my car back

I Mr M.P Gwangwa took a car (Audi S4 BG65Df GP) for engine repair on the 14.11.2018 and was promised that I will get my car within 3months as it has a big job. I have all proof of payment from the insurance that he was paid full money onthe 14.12.2018. I've being keeping all conversations records with him as well as picture and vedios as a proof ever since he was given the car. Therefore later after 8months I was told by the owner of Highends(Adam) to come take my car as is, but it was not fixed reason being he cannot fix the car. And I should take any action thereof he will be liable for all the costs ,now am taking LEGAL ACTIONS against HIGHENDS AUTO and SERVICES for the following ÷

*failing to hour the verbal agreement *poor customer service. *Coursing Malicious damage. *Wasting my time and resources. * Making me surfer for a period of 8months without transport. *Leting my car's licence disc expire while I made him aware about it.

I the undersigned agree to the above mentioned matter and am aware of that and was explained before me that I'll be liable for all the cost raised during that period Now He's no longer communicating with me and i have not got my car yet I really need help