WORST SERVICE EVER

I have been trying make contact to remove the blackbox from my vehicle for a week now they don't phone back including Netstar , this is now my second blackbox I got in and it drains my vechicles battery everytime and it me in a tight spot by asking people to jump start my car....I am on the point to get me a laywer as they are ignoring my calls now and want the unit removed, I also paid for a autolec to identifiy the problem as their techs don't know what to do....even got a brand new battery as what Netstar told me and it still does the same problem...… I will never ever recommend anyone to take out insurance with them