Account suspension

Telkom did not debit from my account last month and dicided to give my details to debt collectors and suspend my line, when i called them they said they could not debit because i did not accept the debit mandate only to find that there was no mandate sent to me so i paid the required amount to debt collectors on Thursday 15th of may but even now my line is suspended and i can not do anything on my phone it's only receiving calls nothing else