Terrible service, unit drains car battery

I had a device fitted with cartrack on a car I had just bought about two months ago. A few weeks in I started having problems with my car battery, should i not use the car for a day the battery would be flat. I would then have to get jump started. I took it into the dealer, they advised me the battery is in mint condition as it is still new but the cartrack unit is draining the battery when not in use. I called in to get the unit tested. They sent a technician after 5 days. The technician tested the unit advised that they had fitted an old tracking unit and that was the reason for the drainage. He then said that he has fitted a new one. I used the car this Friday, Saturday afternoon I attempted to use the car and the battery was flat. I called Cartrack and was advised that the relevant people were not at work that they will escalate the matter and call me back on Monday. Monday came around I called cartrack twice. Both times I was told the relevant people with call me back, and that the matter was escalated. I have been using public transport to drop my kids off at school and get to work. As the battery of the car now gets depleted if I don't use it for as little as 5 hours. I have asked to speak to a manager yesterday and today but no manager is willing to speak to me. The consultants keep saying the matter has been escalated mean time I am not able to use my vehicle since Sunday. I called again today and was told the manager is busy and will not be able to talk to me.