I had 36 month contract with cartrack which expired in April 2025

I had 36 month contract with cartrack which expired in April 2025.Cartrack continued to deduct in May 2025, I disputed the deduction and I was told I have a month to month contract.i wrote several emails to terminate Cartrack bt they were so arrogant. Cartrack is forcing me to continue with their bad service. I have a tracker fitted in May by another company