Lack of response from Vodacom personnel

I have been fruitlessly contacting Vodacom call centre concerning a simple problem of not receiving sms notification of missed calls. I have begged for my problem to be escalated because it remains unresolved, but it seems impossible to actually speak verbally to a responsible management person in this huge company. I am hoping that that this exposure on Hello Peter will at last elicit some response from Vodacom and some conscientious person will contact me on my contact number ***.