I took my car in to get the battery checked out an...

I took my car in to get the battery checked out and was told that it would only take an hour, they did pay for a rental for me to use and I expected to get a call in a couple hours, I did not. I called and they told me they would have to keep it over night and that I can pick it up at 9:00 am, but I had to call at 1pm just to find out my car wasn't ready yet. When I finally did get it at 4pm they had turned my dash cam off when I got there and now it doesn't work. I would not trust them with my car again, what good is a warranty when the service is bad, I would rather pay somebody to fix it.