Cartrack is a ****

Cartrack is constantly wanting to debit me but my device is not working. I bought my car in November 2021 and I discovered that my device isn't working early January 2022. I communicated that with them and they said they would call me regarding the issue and have it fixed. I have emailed them several times regarding the issue and have also told them telephonically that I will not be paying anything until the device is fixed. It is January 2023 and the device still hasn't been fixed but they have the audacity to send me a court summons when they haven't delivered their services to me. I am infuriated by this