Incompetency by Telkom

I initially battled to get stable connection since I signed up with Telkom on 4mbps internet and then the phone line. . I eventually decided to upgrade to a 10mbps line (uncapped) with R500 cap foe all network telephone line. This costs me about R1,300.00 per month. Telkom then decides to bill me incorrectly all the time. I have not had connection since February 2019. When I thought I had the query sorted, I was again billed incorrectly and logged call referenced ********** 2. This time I thought I had a very competent person; Khanyi, but am very disappointed that the query has not yet been resolved. There is no escalation process. If I could I could may speak to their CEO trusting that he/she may understand my frustration and would able to help. I do not what to do anymore. I am due to be charged for services not rendered. Please help resolve my query. I have even been on the call from almost an hour now and there is no answer, although they close at 17h45.