SHOCKING CALL CENTRE SERVICE- VODACOM RENEGE ON CREDIT AMOUNT OWED!

Called in to cxl data package on 29/09 at 12:20. Realised at beg of Dec that I was still being billed, and incorrect package had been cxld. Called on 12/12 at 12:30 to find out why not done. Was told it would be sorted out- and give a reference for the call. And I stated that I would not be liable for ANY bills from end of Sept (when the contract was up, due to Vodacom inefficiency)- as the data had not been used In Jan I received messages that my account was in arrears. On 25 /01/18 I called to confirm that this data package had been cxld and was told it was only cxld on 15/12 after my call in Dec. Of course it was not done. Called AGAIN on 05/03 and spoke to Thato Seshabela (Solutions dept) who then asssured me he would sort it out. He did in fact call me back in the next week with updates on the status and I received an email on 14/03 as follows: Good day Please note we listened to the call, and the agent only generated a cancellation quotation, did not process The agent will be issued with verbal warning for not processing the cancellation. SR for credit has been logged of R1497. SR number is 1- ********** ********** Imagine my surprise when I received a call on 27/03 from the accounts dept re: the short payment on my acc (I had short paid that month due to the credit ot R1497 that would cover the balance of the bill)!!! Was then told that a user (name known to me) in the back office had noted on the 23/03 that this credit was not due to me, and that the call centre would need to refer this query back to them..... Of course I have not had any feedback on this....I guess 7 months on a simple instruction is not a service issue problem as far you are concerned?