My car won't start cause of Discovery insure DQ Track

I have a Mercedes-Benz ml350 4matic which was insured by discovery insurance. The installed their dq tracker in May. I canceled the insurance after I realized that this cash back thing is nonsense. Yesterday I went the mall and after shopping the car won't start. I called mobile locksmith, charged me a arm and a leg. The car still won't start. The technicians failed. Then I've realized that my car has never had issues like this. Discovery insure please sort out this mess cause this dq tracker has a track record of affecting client's cars. I actually regret ever taking this insurance. I need u to sort it out cause this is the second night my car parked at a foreign place.