WRONG AMOUNT DEBITED

On the 31/07/2015 my debit order showed that Tracker debited R390+- where it should only be R90 per month. In July they phoned me informing me my device has signal problems and that they want to install a new one. It was done in July. I phoned 01/082015 (Saterday) and the call agent said my account was debited incorrectly and they will refund me. I phoned on Monday 03/08/2015 where another call agent informed me the refunding was done that same day and it takes about 5 working days to show in my bank account. I then phoned on Friday the 07/08/2015 where another call agent informed it should be showing no later than that day of Monday. Its now Teusday 11/08/2015 and I just phoned again where the last agent iformed me the payment was only released on Friday 07/08/2015 and now I have to wait another 5 days till coming Friday. This is unacceptable as I am a singe woman looking after her mother and is in need of every penny. My tv licence failed to go through for the reason Tracker debit more than was budgeting for. Im seriously considering canceling my device.