I have tracker accounts with cartrack

I have tracker accounts with cartrack. I then cancelled account for 1 vehicle, I had to pay a cancellation fee. I paid the cancellation fee and at the end of the month, cartrack deducted the cancellation fee from my bank account when I specifically told them I will make the payment. I then had to request a refund, 2 months later I haven't received my money after several calls and follow up emails. Unfortunately for me, it's like they don't care. Now I wonder if I should keep my vehicles with them because it seems like it's ok when your account is still active but once you remove a car they don't care anymore. If this is not sorted soon I'm removing all my vehicles from this company.