I should've remained with Vodacom & CellC

I tried twice now to query the same billing issue. The first time I phoned I was told I have to wait for the billing to go through. The billing has now gone through and I still couldn't be assisted because now the escalation system is down. So now I have to phone again in about an hours time and explain my situation to another person who might at that stage also come up with a reason for not being to resolve my issue. I'm being billed for usage limited I know for a fact I didn't exhaust because I turned my data of before I even ran out of data. And no one can explain how. They can't even pick up on the system on their side that I bought a 1GB bundle for R49. How is that possible? And even last month in the middle of the month I was billed an additional R50 which no one could explain either. It was fixed thou. I was billed R50 less on my following invoice. They can't even give you reference numbers for your calls. So if you phone 5 times for the same issue you're going to have to explain the same thing 5 times. I think technology is far advanced for us to still sit with this as an issue.