Deducting for 2 decorders while only having one

We are struggling now for 4 months with multichoice. I have spend ours on the telephone trying to sort out this problem. We have a holiday card connected with this account and only one decorder. We are paying cash for the holiday card at pick and pay when we are using it. Now they deduct it from our account as well. Last month Tshepo the supervisor promised that this is sorted out. TOday we received our bill the debit order went of again double. Not even the managers can sort out the problem. What will be my next step, the news papers, carte blanche? Also spoke to Nombuso trying to sort this out. None was able to help me.