Horrible Cell C data sims

About two months ago, I signed up for a Cell C data sim contract. Since the 1st of August, I have had consistent problems with using said contract. When I phone Cell C, they simply say that they are aware there is a problem and are working on it. It's simply not good enough. I have had to purchase data for my other sim card in spite of technically having data. In addition, the data expires, so not being able to use it is a real problem. I hope a Cell C representative will be able tell me how they are going to compensate their clients for this.