Telkom charging incorrectly and then refusing credits

Telkom SA you are the most *********** bunch of ******* around. You are quick to demand my monthly payment each and every month however I do not have recourse against you and your *********** staff in resolving my refund dating back to February 2017. Yes, Feb 2017 when I started my investigation into you incorrectly billing me for the incorrect monthly payment which had resulted initially from an error by your local staff members in making the incorrect changes to my plan. I have tried for 18 months now to have this rectified and each time that either your office phones me requesting that I repeat the same explanation over for the 100th time I still end up with no resolution even though I was convinced by yourselves that you had found the error and would rectify the account soonest. Just so that you are aware, Telkom did initially refund me R 2500 after 6 months but I believe that it was done thinking that I would be satisfied with the small refund token when the amount owing to me was in excess of R 10 000. You have made numerous promises to get this resolved after the many calls from my side yet we see no attempt from your side to get my money refunded to me even though your staff have admitted that the error lies with Telkom but no-one needs to be a brain surgeon to see that. Really 18 months down the line and we still do not have this resolved. I need this issue resolved ASAP otherwise I will need to look at what my legal right is in this regard.