Dysfunctional accounts at DSTV

As an annual subscriber, I pay in November for the year. This year ,on checking my account ,I discovered that I had been billed R 105.13 in April(annual increase time) and that this had been off set against a R 30.00 credit I had for a box office account. There is no DSTV package costing R 105.13. Despite an e mail to the accounts liaison official, manager and CEO I have had no response. To date , on my self service log in, I have an account balance of R 6829,13, due on Jan 25 2020. I want my credit of R 30.00 restored and my account rectified to reflect the correct balance. I want the accounts department to contact me on my cell phone, whose number is on record to rectify their error.