My MSISDN doesn't RING

I reported this incident before my upgrade at Vodacom and its seems as if the problem was not solved. I use my phone for Business and is under my Company Name. I lose business due to the fact that my number doesn't ring at all nor either vibrate. Every customer, family member, or friends are complaining that whenever they call my NUMBER its rings once then beeps twice then cuts. The only thing i will see of my screen is miss calls. I get close to 30 on average miss calls from different numbers a day. The Call Centre had informed me that I had call barrings which i don't think its true, they were deactivated. I am frustrated and failing to understand what is the root cause of this. I cannot comprehend the amount of business I've lost thus far because of such incompetence and problematic network <br> It is sickening and exhausting to be told \switch off my handset and switch it back on "but the problem still exist. This use to be problem on my old phone and again on this new upgraded phone. I can't take it no more. I am precise the problem is the network or the sim card not the handset.<br> I will be expecting a reply and prompt feedback from someone in Vodacom"""