Extremely frustrated with the poor customer service

Nothing has been pleasant or easy in dealing with Telkom since I've signed up with them! At first I only rented a fibre line from them and two months ago, added data to the package - what a mission that was. Firstly, the Telkom store couldn't understand what was required (a data package) and insisted I had to pay for installation and the modem all over again (I already had fibre installed and was renting a line from them!?). I then had to brave their contact centre which was an even bigger joke, not one person I spoke to sounded like they were truly interested in assisting. Never the less, they signed up very quickly for an uncapped data deal but getting me up and running took around a week. I had to make manual payments to speed the process up as my "credit limit" with their accounts had to be increased for the new debit order amount. I agreed to the increase to avoid any future hassles. Did Telkom do their job? No, they didn't and the debit order did not go off, so they suspended my line. Should be an easy fix right? Telkom didn't increase the limit, so re-instate the line and process the new debit order - avoid a disgruntled customer and retain business, should make business sense right? Still not. Instead im told to make a manual payment and only then will the line be re-instated. Unhappy that I now have to go out of my way to fix the mistake they made, I still ask when the line will be re-instated once I make the payment - no timeline can be given, the call agent is unsure. So I must fix your mistake for a new service that took much effort to get from you from the start and be happy with services coming on anytime between now and never??? Cherry on top was that there's no supervisor to speak to - convenient. Telkom is NOT the cheapest, NOT the fastest, NOT the most reliable ISP out there - why must your customers struggle like this? I made it clear to your uns****ed, amateur contact center agent and will make it clear on this forum - contact me TODAY COB and prove that you can resolve this issue or cancel my services please.