Shocking and disappointing service. Going legal.

Shocking service. My account has never missed a payment since starting in 2002 with Vodacom. Last year I moved it over to my Business name from my personal name, and again, never missed a payment. Today I went to find out about upgrades etc, only to find out my personal account was never canceled correctly, and my details has been handed over to the legal department, and possibly loaded as a bad payer, which will affect my credit rating as a business owner. I am very disappointed with regards to this, and their incompetence as a service provider.