Telkom pathetic service

I had the worst set ice from telkom. Every month I receive my statement and I pay my account. End of December I was in credit with my account. All of the sudden I get an account stating I owe them r2000.. Two days later my account was cut without notification that I owed money. Now I'm without internet, which is not fair as my account is up to date. Phoned the call centtre 2 time and they can't confirm where it comes from and they need to send it. Through to the accounts department. Meanwhile I'm without internet, I m paying for a service which is cut without no delay and it was done in two days. How is that fair. I received invoice yesterday and today my line is cut. This is pathetic