Bad customer service and test centre

have two cars with the following registration :<br> 1. BANDILEMP - Golf 6<br> 2. CT98XNGP- Mercedes Benz <br> My old car was a Mercedes Benz registration BD60DXGP which the tracker was transferred to the new Mercedes Benz.<br> <br> I called to do a test sometimes this month and I was told that the tracker on Mercedes Benz doesn't exist and need to know why as I have been testing that tracker previously .<br> <br> I was told that they will contact me even now I am still waiting for a call from tracker . My account is been debited everymonth whith the monly subscription yet I don't have that service .<br> <br> I need to be resolved and money to be reimbursed to my account as I never received any service .<br> <br> My other complain is I am required to do the test during working hours whereas those times I can test as my cars are parked . I only drive them after your call centres are closed . Why would this type of service implemented that don't suit the customer's needs ? I need to do my test any time of the day as I am paying for the service . When I entered into your contract I was told I can test any time.<br>