Disgusting Service All Round and ITC listing as a result

The service currently being received from Vodacom's Customer service team is absolutely disgusting. Nobody gets back to me as they promise they would. I have been having an issue with a data contract that I have since last year, to date the issue has not been rectified and as a result I have been listed on ITC as an account in arrears even though manual payments have been made, cause you don't know how to debit an account properly. Everytime I call through, I have to repeat myself and nothing gets done and no calls are returned from managers and team leads. A Team Lead by the name of Tasneem from your customer care department has not called back from last Monday (16th Jan), Monde had promised that she would call me in 5 minutes, I then called back today and spoke to another consultant by the name of Lu and he was extremely rude. Please go into the relevant account to see the issue being experienced as well listen to calls about taken by your consultants.

I want this data contracted cancelled immediately and all ITC issues resolved as a matter of urgency!!!!