Telkom fix my issue ASAP! 12 months waiting.

They activated the wrong Fibre package and overcharged my account extra R2000 every month for 12 months, despite of me escalating the issue 19 times. They still haven't solve the issue, even though they keep admitting it was a mistake on their end. Now that the 12 months lapsed, they deactivated my Fibre, and they cannot reactivate it until the billing department applies the credit and there is an outstanding balance of R18000 that keeps giving me anxiety and it is not my fault, I kept paying the correct amount each month. It seems a simple issue to correct on their side, but it has taken them over 12 months and still they can't give me an ETA, and I don't have connection! I am so disappointed. This is incredible. I just want to get my account in good standing reactivate the service, but they keep bouncing the case between Sales, Billing, Vumatel, and back. Unacceptable.