UNHAPPY WITH NISSAN MENLYN AND NISSAN GEZINA

Greetings, took my car to Nissan Menlyn for a major service. When the car got back it wouldn't start, I then took the car to Nissan Gezina for diagnosis, the diagnosis came back and said it's the BCM Body control module and it would cost R15000 to fix it. I paid and when the car got back the airbag light was on, I took it back to Gezina and they switched the light off. After a day or so the car started to malfunction, it would switch itself off, reff itself and switch on and off the dashboard lights. I took it back to Gezina and I was told my battery is flat, a battery that I bought less than 2 years ago. The car can't start therefore I need a new battery so that the car can switch on and be assessed. I'm so frustrated, I wanted to buy the new Magnite but after my experience, I'm taking my money somewhere else, maybe to Hyandai.