Poor Customer experience & problem solving

My line was recently (September) blocked by Cell C. When i enquired about it, I was informed that I owe Cell C money as my subscription had gone up. I asked why I wasn't informed but they insisted that they had sent SMS'es (which I never received). I was asked to call the call centre and was duly informed that I owe Cell C money for not paying the full subscriptions for August and September. I duly paid up for months August and September as they had indicated that my line would remain locked until i paid up these two months. Upon enquiring why my line is still suspended earlier this week, i was informed that my July payment wasn't paid either. I do have the receipt for my July payment however my query relates to why your system isn't reflecting my accurate payment history. I would like a Cell C consultant to sort this out immediately as this data line is used for the business of my NPO and it is impacting my ability to get things done at the moment.