Incorrect billing, online portals not working, managers not working!

I noticed that according to the DSTV website there was an "outstanding amount" on my holiday home, however as the amount seemed incorrect I then tried looking into it via the transaction history - suspiciously there were then "no transactions to be shown for the period in question" - i.e. how on earth can there then be an outstanding amount for that same period?? I then tried digging into it deeper via their "online chat service" - which as always couldn't resolve the problem (even though when you call the call center these days they often tell you that "they cannot resolve the problem on their side - and that you thus need to make use of the "online chat" instead) - which isn't even humanly operated but rather an automatic bot system that can't apply any logic?! To then add much more to my frustration, after calling the call center and spending around 45mins (?!) on the line (on my expense!), they informed me that according to "their system" there were 2 periods when they claim the holiday card was activated for a week+, even though we only switch it on and off during weekends (and in some case long weekends as well - but not for example for 11 days in a row as they claim!) - clearly they're making BIG errors in this case as they for example first tried claiming that "I activated" the holiday home from 8-18 June - whilst they also claimed that "I then again activated" it from 14-21 June... please tell me how on earth can "I" possibly activate it again on 14 June in case you just told me that "I" already activated it from 8-18 June?! I.e. how can you activate something that you claim was already activated on that date?! I then asked to discuss this what seems to be a clear ********** business principle with a manager - who as always "wasn't available at the time of the call but would give me a call back as soon as he/she becomes available again"... same story different day as I'm still waiting for Mr Dumisani Radebe to call me back! Please also note that this is now the 4th complaint within the last few months that specifically have to do with both DSTV's self service online portals that never seems to work along with various indiscrepancies in their billing specifically related to the way in which they frequently get the billing incorrect - as well as various "managers" never getting back to me... very very suspicious way of milking money from their clients and then hiding away from it by merely ignoring inquiries into it! Also, for the DSTV "Hello Peter" consultant who is reading this - please don't reply with your normal "We are so sorry for the inconvenience and will look into it and get back to you soon" message - as clearly from my past 3 complaints that didn't work/happen - please rather just get a (real) manager to (actually) get in touch with me directly asap otherwise I will gladly take this case further via social media as well... I'm really sick and tired by DSTV's pathetic service and ********** billing!!