Battery drainage issue frustration

I’m very unimpressed with Chery, every morning I have to call AA to jump start me cauz at the night the car switch on the back lights by itself. The AA guys advised me to get it booked at the dealer as this was not a battery issue and they dealing with such cases daily, I then booked the car in the whole day yesterday at the dealer and I was told that there don’t see anything wrong with the car and this morning I just had the same issue again. I am still waiting for AA to jump start me, this is such an inconvenience as I have to waiting around 45 minutes for AA to arrive all the time. Can @CherySA assist urgently as this is really make it very unpleasant to own a Chery Tiggo 7. The car is less than a year old and I already changed a gearbox , now is this issue of battery drainage. If Chery can’t assist or diagnose the problem where must I get help?