Telkom - no manager call back as promised

I've been trying for days to get my billing changed to the correct package after a Telkom call centre agent mis-sold me the incorrect package. I have spent hours on hold, usually hanging up after holding for 30 min or more, dealing with untrained staff who have no idea how to resolve my issue. Today I got hold of Thabo who was also unable to assist but promised he would have his manager Zandile call me back, I'm still awaiting her call. This is the 2nd time a manager in this week has promised to call back but has not done so. I believe the manager on duty was Mrs Ntombizeathu, I am very dissapointed as I'm a brand new Telkom ADSL customer and already regretting it severly. Can anyone help?