Vodacom giving me a bad credit rating after VODACOM made the error on my account.

I have reported Vodacom a couple of months ago at the ombudsman after they had continuously charged me for data bundles which I had never bought. The charges were reversed and I was once again a happy client until yesterday. I app**** for an additional contract on my name and were informed that my credit score with Vodacom were not good enough . I am now the bad client after VODACOM was at fault.How does that work?How is it possible for Vodacom to rate me poorly for something that I was not guilty off? The CPA is suppose to protect me from situations like this and I will report this to the ombudsman again as I will not allow VODACOM to give me a bad credit rating for something that I was NOT guilty off.