Bad service at the midstream ****a shop

Bought a car which is almost a million at midstream branch and drove it back home same day it gave me a drive train error also the sales person didn't mention that there are other functions which are not working on the vehicle as it was not on the dekra report. I logged a complaint they pretended like they helping now they not even replying to my emails. Lastly even when I was buying the car the sales person didn't care aslong as he gets his commission I had to do follow up if the car is ready they didn't even give me a permit as they ran out. So I"m basically driving a car with a mechanical issue with no disc and no permit. I feel like they running a ****a shop.