Horrible customer service

I'm on Telkom mobile using a Free Me contract. On Sat(13 October 2018) I increased my spend limit and used the increase to purchase 2G FreeMe Data Bundles. Immediately I received a sms saying my funds are depleted. I then called the customer center to resolve the issue on the same day and was on hold for more than 5 minutes so I abandoned the call. I called again on Sunday around 10 pm and after being on hold for approximately 9 minutes the agent that I was speaking to ended the call. I made another call shortly after and was assisted by another agent who told me that he is logging my query as a case and that Telkom will be in touch with me within 72 hours, Well yesterday(Wed 17 Oct) I called to follow up on my query and guess what? The agent told me I have to wait out the whole 72 hours as I logged the query on Sunday night so they have until 3 business days from then to respond to me. I find this quit condescending & delay tactics as Wednesday is 3 business days and I do not believe that Telkom intends to call me at exactly the same hour at which I logged my call at 10pm?! When I asked the agent to put me through to the supervisor she told me that the supervisor will tell me the same thing. It's now 1.30 pm Thursday and no one from Telkom has contacted my so I guess I need to take time out of my work day and be on hold for about 10 minutes just for them to render some useless customer service.