I never in my wildest dreams Expected such bad Service from a Dealership No Customer service at all

I have never in my wildest dreams thought I would have to go through this I actually want some sort of advise

I purchased a used car from Mahindra Roodepoort. Unfortunately I was assisted by the Dealer Principal. You would normally be excited and think wow what an honour. I bought a beautiful used car from the Roodepoort branch on the 9th of November. After returning from my holiday I was told the car is not ready for collection repairs has to be done. I battled to get some feedback from the DP. Anyway I then received my car on the 15th of November. Upon delivery I immediately informed him that there were still faults on the car.simple things like head lights that are shining right in front of you.Unable to see anything during the night. There were also mechanical issues. Anyway next week it will be a month since my car is there.When I eventually,after texts calls and WhatsApps do get hold of this guy. He always has a different story"we found another fault", or "Ford send the wrong part" If you have not been communicating since the beginning and Dodging calls.How can you believe a word he says And the biggest problem of all is that he is the Face of the Branch. So if I am not getting any information out of him, what do I do