Very Very Poor Service

I called the Cartrack call center in December for an upgrade, they then debited R350 extra for the upgrade together with the R140 premium. The whole of December I waited for a technician to no avail. Then I spent the whole of January calling them to arrange for a fitment, which I was directed to the Rustenburg offices, then to the Polokwane offices... But still no fitment was done. I then reversed their debit orders, and now they are telling me I owe them money for an upgrade I never got!