Absolutely Terrible Service

I have been trying to upgrade my payment package for the past 2 weeks and have called the call centre 7 times already. Still with no success in doing so. Every time I spoke to an agent they said they will take my details and someone form the outbound sales department will call me however nobody has called me to date.I have escalated this matter with 2 managers Selina and Siphokazi who also could not provide me with relevant turnaround times as to when someone will help me. Apparantley the manager of the outbound sales department is Brian Konqobe who is obviously not attending to these escalations that have been made.