After 26 years I'm leaving Vodacom and will advise all my clients (I'm a corporate lecturer) to follow suit

I’ve been with Vodacom since 1994 and my experience today suggests that it’s time to change. Total of 3 hours on the phone to them, spoke to about 5 different consultants about a simple query. Two promised to call me back. Neither did. Next thing I get an sms saying my request for an upgrade had been generated. I never requested an upgrade so I called again. Another hour or so, only two consultant this time, who promised to call me back…… neither did. The upshot is that I will no doubt be upgraded and charged more and it seems I am powerless to stop this as the call centre staff are simply unprofessional. My only hope is that Vodacom monitors this site (as any competent, customer-centric provider should) and will call me back. Andrew ***