Not getting missed call notifications

To whom it may concern:

Since the 2017 I do not receive any missed calls notification, I have called Vodacom countless times but they keep telling me about the voice mail settings which Is not a problem, all my settings are okay but I haven’t received any missed call notifications for the past two to three years. I’m am very frustrated and Vodacom keeps giving me a very very bad service.

This is a basic necessity of any service provider yet Vodacom seems to be neglecting it’s customers. I've been a loyal Vodacom customer for the past 15 years and the last 2 years has been absolutely horrible I can't understand how it is possible for such a great company to take such a great leap forward and then take two leaps back. I sincerely hope for a quick resolve from Vodacom because it is unacceptable that neither the Vodacom consultants or the Vodacom shop can assist me with this problem. Awaiting your speedy reply Kind regards