Cartrack is not helping all

Cartrack has debited my account on 4 occasions for the past 2 months, I logged a query on the 23rd of August and I was promised a refund would be done in 14 business days, I followed up again on the 30th of September and promised that would again reflect in 14 business days, till now I have received no follows up from the accounts department, only calls and messages from their customer services claiming I still owe them R92 as I have defaulted on the arrangement I had with them.