Blocking my account

I have been with telkom for many years. One of the many services I have with them is a mobile number. This number is used by the hospital I work at to get hold of me in emergencies in the wards and when I am on call, so this number cannot be changed in a hurry. Telkom decided to block my account 4 days ago because it is discontinuing a service and did not warn or tell me about it. I am with a locked phone that I and my patients rely on and Telkom over the countless visits and calls has still not helped me in resolving this. The service is pathetic and I would sway anybody from supporting such a company