Incorrect invoicing

I urge the Telkom National Credit Manager first check his records before sending Letter of Demands for accounts. I cancelled my landline account including giving the required 30 days notice. I received confirmation of the cancellation. When I received an invoice, I contacted them via online agent; again later via call center; again later via customer center in Cape Gate; again via social media online agent. When the accounts department called me for payment I explained the situation. Every time I forwarded confirmation & reference numbers & every time was told it would be fast tracked. I never received a reply, just another invoice. It is so easy for companies to put a black mark against persons credit records & say that they did their due diligence. I beg to differ, I did my due diligence in trying to rectify YOUR companies mistake. I have made peace with the fat that I am just a number, but that little black mark you put is against MY NAME, not a number!