Vodacom does not want to cancel contract due to overdue amount(dispute)

Vodacom changed a debit order date and now Vodacom does not want to take accountability. When I called to cancel a contract that is ending now in June I was told that they unable to cancel it because my account is in areas and it is locked. Vodacom can not expect a contract that is ending to run when I have called to cancel on the month that they asked to cancel it. This I will take with icasa

I have requested for Team Lead/credit manager/accounts Receivable manager to contact me with regard to the overdue but no has contacted me at Vodacom. I have written two reviews before this one for the same thing but I still have not received any response from Vodacom. Again I have no choice but to involve NCA in this matter since now my credit record has dropped because of this

Now this amount is sitting as an overdue on my account and it affecting my credit score which I have built in the past. I'm disappointed on how the issue is handled by Vodacom and I have told them to rather give me what I owe in all contract so that I can get a loan an settle them. Im really in a point where I feel customers are not treated with respect.