Bad billing Service

As a new customer I must express my disappointment with the service I paid for the month 20th December Cartrack further debited my account again meaning they charged me R440+ I called in the lady said I should request my bank to reverse the transaction since my account is up to date which I did now I’m getting calls and notification about my account being overdue please fix your billing system before you lose more clients.

I expect a call back with this resolved. EdsonMacie