Worst service and incorrect advise given to client

Worst service ever from the call center agent who told me that the package selected means they will not alert me when the battery is removed from my car to the technician who installed the tracker cause after he was done my car wouldn't start and he told me its my cars starter meaning I'm at fault after when he arrived I was able to start my car and move it to the back of the house for him to work now I can't even go to work because my car won't start I have to push it every time and even their manger said its my cars fault and now I'm still liable to pay for a service I have not used its only been 48hrs since I signed up and to add insult to injury I removed the battery from my car and they didn't notify me when asked they said they'll investigate and still nothing now I must pay for repairs for my car and still pay them never car track is the worst people be aware