Network Issues

Since 2004 I have been a Cell C Subscriber and the issues I have had were minimal. However for the last month I have no data coverage in my home between 5pm till the next morning. At times I am unable to make calls or do anything with my devices. I have reported this numerous times and received no feedback worth anything. I don't see what the problem is as there was never an issue before. I desperately require the use of my phone, my wifi during from 5pm onwards and I cannot accept this complete lack of service from Cell C. What I would like done is to have my network problems gone by Monday, if Cell C is unable to do this, then I would like my contracts cancelled without any cancellation fees. Why should I pay for a service that is not being provided to me. Please note when you call me back, I don't want any excuses as I have called the call centre I number of times I have already received my fair share of excuses from them. I want a solution and I want proper service.