Poor service, treating a customer like dirt.

I received an sms from DSTV stating I took out a compact device and I need to pay in. I called DSTV to inform them I never requested this, they informed me that an installed linked it to my account. At no point did I request nor add this service. DSTV informed me then it's been canceled and you won't be debited. On the 25th March, I then get debited R400 more than my actual debit. I called to ask them what is this amount, they had no answer and said the finance department will call me back, no call. Today, my premium subscription has been canceled, and have no DSTV. I call again this morning at 08:00 and assured I would be called back by a team leader. No call. I call again, now the agent is saying I owe R500and something to DSTV, yet they over debited, firstly, my services have been cut off. This is unacceptable, I have been with DSTV for 12 years, debiting my account with no problems. No one can assist me, no one calls back. Management is not available, and still no one can resolve this. With different response each time. This query is a nightmare, with no resolution and no one wants to take this seriously nor acknowledge that they have allowed someone to add a service on my account without permission, over debit me, then cut me off, then say I owe money. Unacceptable! I want this resolved now!