VERY BAD SERVICE FROM CARTRACK

I am more than disappointed in the service of Cartrack. I requested that they remove a device from the vehicle I sold and reinstall it in my new vehicle. I have been waiting more than a month for them to complete the request. They already invoiced me for the service without doing anything. In August after paying my monthly contribution I received a WhatsApp message that my account was in arrears. I contact them and they informed me it is for the service I requested. After explaining that the work was not done yet, and that is the reason for non-payment I was threatened that my account will be suspended and I will be responsible to pay the amount of R25000.0. Once again I explained that it is unfair to expect payment but the work is not been done yet, They kept on threatening to suspend the account and keep me responsible for an amount of R25000.00. I eventually paid the invoice of R870,00 for work that was not done because I have another vehicle that is also insured with them. After paying I once again requested that they finish the work because my new vehicle is not covered without the installed device. I got no reaction. After a week I approached them and received a message I must send my id number and the vehicle in question registration number for security reasons, i comp**** but they never responded. On Monday (21/8/2023) i contact the telephonically and was informed that they will attend to the problem. When I received no feedback I texted them i received the following message "Kindly advise when can we debit in order for your account to be up to date" This is absurd and unprofessional. BAD BAD BAD service