Beyond disappointed and angry at treatment and servicing of my car

Highly disappointed, dissatisfied, angry and annoyed at the service centre for Mercedes Benz Shelly beach which is in Izotsha. Took my Mercedes Benz A class for service in March this year and I have been having problems ever since I took it to them all within 6 months. First it was the big battery needing change yet I had bought the car a year ago from them when I asked why they sold me a car with a faulty battery no one could answer, secondly was the small battery needing change, then my carrier for my light was broken, then an oil leak then my alternator all these in total according to them came to a total of R50000. I took it to another Mercedes mechanic who confirmed that they did a nonsense job on my car to begin with and now since my alternator was faulty and my car wasn’t moving my battery is failing to charge. That battery is not even 5months old!! They told my guy to bring in the vehicle with the battery and I’m asking why? They’ll mess up my car once again. If you want your car broken take it to Mercedes izotsha and there’s really no sensitive customer care either! It is sad and disgusting what they are doing to people according to my complaints I’m not the only person with a horrific experience there. They should just close down