Billing issue with bad attitude

I have been struggling with dstv for 3 months now. 3 months over the same issue. In the end of August I called in and downgraded to extra package and it was done. In September when I was checking my payment it stated I owe R1300. On the system it still reflected premium. Since then dstv has struggled to reverse all the money as they keep disconnecting my services as I owe money knowingly they are struggling to reverse the fees. With ample airtime and time on the phone.they stated my account is reversed and is normal now. Today when I wanted to upgrade to premium for the world cup, it showed I'm overdue R150. R150 FROM WHAT?????? As always the consultants are rude and I'm explaining what has happened but they do not understand. I was on the phone with 2 different consultants for more then 30 minutes but still they tell me I owe them money but they can't explain for what? Someone dropped the call as I was explaining as he was tired of listening to him. Please, how much airtime must I waste on this issue? I have not missed my payment once.