Government apartment in the hiding

I was unhappy about a debit order that was put through my business account without my authorization. In July I had decided to move my account as the fees was to much. I informed Sharda about my decision, but I am still receiving accounts for fees on the business account that I closed in July. Sharda is refusing to do anything and I have even spoken to the call center. And NOW I am even receiving letters threatening legal action if I don’t pay these fees. If anyone is interested in taking my advice stay away from Standard Bank business account as all they will do is rob you