What's going on with this network??

I am very frustrated. I spend over R200 on airtime in less than a week buying airtime and data. Today only, I bought over R60 of airtime and it's finished, not even one call lasted two minutes!! I thought let me try buy data maybe airtime gets depleted faster, in less than 10 minutes 100mb was depleted. That was not the only bundle I bought, that was a second 100mb bundle that got depleted in a less than a day. I did not download anything, I have to continously switch my phone on and off just to get network! I wish I could just cancel this contract because it's really frustrating. I call the call center and I get advised to call technical support and find out what's going on!! I need to do my own research??! I have also been trying to log a claim as my screen is damaged!! I call the insurance side and held for over an hour yesterday. I sent an email and I have to wait for 5 days just to initiate the process?? I really can't live like this. Someone needs to get back to me ASAP, reference number for that claim is ***1, someone has to do something. Please!