Bad service, incorrect capturing and running around in circles

I purchased Telkom's Advanced LTE Uncapped 40Mpbs contract on a special at R999.99 conditional on a 24 month contract. After approximately 12 months into the contract my wifi started slowing down to the point of stopping. After calling the Telkom customer care line and speaking to Nathan, I would told that the Telkom store in Telkom Pavilion, KZN, would be in touch with me. The Store Manager at Telkom Pavilion confirmed that the system reflected that I had signed the Advanced LTE contract, but it had been incorrectly captured as a Softcapped 20Mbps. The Store Manager confirmed that she changed the softcapped to uncapped and that she had raised it as a dispute with Disputes Dept. She confirmed that she could not amend the cost of the subscription - only Disputes Dept could do this. I would be refunded all data due to me and any overcharges. In my next statement, my subscription had gone from R999.99 to R2250.00 but I still have 8 months of my contract to finish. In the meantime many e-mails have gone backwards and forwards beween my and Telkom Pavilion. I have still not heard from the person who is responsible for reverting to me from the Dispute Dept, namely Mr Donald Qaula, nor his line manager, Mr Steps Naude, to whom the matter has been escalated due to Mr Qaula's failure to respond. I have a copy of the e-mail sent to them from the Store Manager at Telkom Pavilion. I have tried calling both of their landlines and cell phones, all of which ring forever and do not leave an option to leave a message. I do not know where to go from here.