Post-Paid Contract Issues, cannot make calls

My post-paid contract was upgraded about a month ago. I now cannot make calls due to insufficient balance.

Calling the customer care line is a waste of time as it does not give you the option to talk to anyone, the call just cuts off or returns you to the previous menu about privacy. The website is just as useless to try to resolve this issue.

It is almost impossible to get hold off anyone at the call centre or even find the correct category on the menu or on whatsapp.

Can someone please call me urgently.