Cell C's so called 'improvement' to network

I don't like to have to always come to HelloPeter with complaints but this seems to be the only way to get some service with Cell C. I was notified via sms that cell c was making changes to their roaming agreement in order to 'improve' service coverage for their clients. Well this happened but it has been far from an improvement. First with my wife's number and now with mine. We have either no mobile coverage or the old Edge at times. Calls drop due to signal coming and going. I can't even phone the call centre for help because it keeps dropping the line. I contacted the service centre earlier in the week to notify them of the problem and the agent told me that it was escalated and would be resolved within 48hrs. Well that time has come and gone and all that happened was that my own phone started giving the same problem. I followed all the steps required to enable data roaming but nothing changes. On the website it says that Apple phone users don't need to do anything as it changes over automatically. Not true, I had to activate data roaming myself but it didn't help. I would say the point of having a contract agreement that I pay monthly is to get a service of data and calls from the service provider, cell c, but at this stage I don't get either of the mandatory requirements of this agreement nevermind actual customer service.