Account payments

Telkom handed me over to their debt collecting company for an account that is paid in full. After sorting it out I still get msg threatening me with breach of contract. After phoning NuDebt for the second time I still have no answer except that I have to send them prove its paid up.<br> This account was a mess from day one as didn't get the package I asked for. The debit order date I requested was also a problem. Then I was told I can stop it, then was told I couldn't and then I was told I can have the original date for the debit order.