Bad quality service and very bad Jeep SRT8 vehicle

I bought my 5 year dream car which is a Jeep Grand Cherokee SRT8 6.4L V8 which costs R1million and is Jeep's flagship vehicle. I bought it on 23 December 2014. I drove down to Pongola in KwaZulu Natal on 24 December 2014 and 9 days later the gearbox broke of the vehicle. I was deeply disappointed and phoned Jeep roadside assistance to tow the vehicle back to Midrand to have it fixed. After 4-5 weeks of struggle I got my vehicle back from Jeep Grand Central in Midrand. They said that they replaced the gearbox and some other parts, but when I requested the job cart they said they didn't have one for the job that was done on my vehicle. Every day since I could feel that my vehicle was not the same, it had less power and sometimes the gearbox jerked a bit and then the engine light would come one and I have to stop and restart my vehicle. Needless to say after less than 7 months and 10,000km again on vacation my gearbox broke again, which stranded myself and my girlfriend in the middel of a dangerous area in Natal 20:00 at night in the rain and dark. Jeep service has been shocking so far and unhelpful. This is utterly disappointing to say the least. I will NEVER buy a Jeep again!!!