Telkom Mobile - desperate to get feeback on a case I logged a month ago.

In October 2017, I called Telkom Mobile to cancel my data contract so that I could move to CellC who, at the time, had a better deal. I was forwarded to a sales unit who convinced me to stay with the network because they had a similar product offering. I was advised that I would not be charged a migration fee (and obviously a device fee since the new contract was a sim only package). I only realised that I was actually being charged for migration and a new device new in March 2018 on a monthly basis. I called the customer care line on the 13 March 2018 and a case was logged. I have called almost four times since then to see if there is progress on this case but have not received feedback. I called again today on 16 April 2018 (which is a month after the case was logged - case no ********** 4) but was told that there is no feedback on this case as yet. This delay is not acceptable and I would like to move to another network as a result - I am desperate to get feedback on my case and don't know how else to reach Telkom.