Also being billed R279 for R99 data contract

After numerous calls to Cell over the past 2 weeks and being promised that I will be called back within 48 hours, my account is still not correct. I have not received the credits I am due and the Cell C debt collecting department keeps on phoning me informing me that my debit order did not go off and then for the 5th time I have to tell them that I do not have a debit order arrangement - I pay via EFT. I have to keep on phoning customer care just to be put through to the sales department then the deliveries department then to the cancellations department with a promise that my account will be corrected just to have the debt collection people phone me again telling me my account is in arrears even though I am over paying each month and I have discounts due on my account. Do these people / departments not communicate with one another!!!??? What do I have to do to get this sorted???!! Absolutely unacceptable!!!!!