Dstv overcharging and not keeping to their promise

This is hugely frustrating, dating back Feb 2019. Communication with an agent (Khulekani) and Team Leaders (Phelelani, Briden) and later with Managers (Zamani Ndlovu, Tebogo Thobejane) to have premium account upgraded to PriceLock. Currently now (October 2019) this has not been done and was promised in writing of the amendment, several times. I have all the information and communication from two Managers with apologies and promises of these amendments. Now to confirm my premium account should've been updated from EndOfMonth Feb 2019 with correction of outstanding credit funds to my account.