Annoyed and fed up customer

So the other day I received an SMS from Telkom stating that my outstanding Telkom account has been handed over to P&P attorneys - bearing mind that I only have a contract phone and router however the billing outstanding balance was a Home Unlimited 10Mbps I app**** and never received now my account is handed over to Legal, I am unable to apply for loans and a bond, I am really annoyed, how can I owe something I did not receive, I need this to fixed urgently because you might lose a loyal customer due to this, I am fed up.