No Smses

I have been using Cell C for almost 2 years now.Each time I have used the customer service I have not been assisted.Today I opted to take time off work to sort out my phone issue.I have not been receiving any smses for a period I am not aware of.This means when i buy data I am unaware if it has been loaded or not.I have lost numerous data bundles and airtime because of this issue.Not counting the fact that I don't get bank notifications and missed call notifications.Its more frustrating today because I have received money via Standard Bank Collect Money service and i still havent received it.I called the customer services number and the call dropped.I went to Cell C and my network was refreshed and calls were made but still nothing was received.I have sent numerous test messages to my number,although the airtime from my other phone is being charged,i am not receiving smses.Please help me sort it out.