Tracker is a horrible company.

I bought a car in 2015 and Momentum was my insurer. They said to make my insurance cheaper I must install tracker on my car. WORST MISTAKE OF MY LIFE! The car had a few issues and since it was still under the six month warrantee it was taken back by the car company who then fully reimbursed me. But since May 2015 until this day tracker is billing me. Despite multiple phone calls, emails and responses to emails sent to me. When will this madness end?