Failure to provide a service

My account had an amount due of R 1 600.80 which was debited by a service provider of Telkom mobile (Nudebt) six days ago, after I had sent proof of their debit, and numerous calls to their call center (customer service) to inform them of the payment my phone line has still not been connected. In their response they will not reconnect until proof of payment reflects, however proof has been provided and they still refuse to provide me with a service.