Tracker Deduct my account and I do not know why

When I purchased my vehicle, the dealership took a contract with Tracker Connect. On my bank account, there is an amount of +R500 for a tracker that I do not know about. When I contacted Tracker Connect they stated that they have not been debiting my account, the 3-year contract has been paid up by the dealership. I need to know who is debiting this amount from my bank account with reference to Tracker Connect. I have made efforts to find out from the Tracker Connect staff but they seem to be *********** even when I requested the logbook to claim for the SARS tax. They do not know the cycle, or how to help.