Telkom callcelled a service with no notice and now no one in any of their departments is willing to assist getting out line running again

2 Days ago i got an error on our phone "invalid sim". Now i can't make calls because of this so i have spoken to every department on your chat option. Not 1 of the 6 people i have spoken to can help. all they say is they cannot help, i must call sales off my invalid sim?

this was the best feedback i could get?

:32:20 AMSikhumbuzo: Thank you for your patience. The FLLA line is not Activated it has been Discontinued, this is the sales related query. Unfortunately we’re unable to transfer you to our sales department due to a few technical difficulties on the system. Please dial 10213 to be able to reach our sales department for further assistance.

How do i get out line working again without being able to make a call because telkom discontinued a service without notifying its customers?