Old Mutual worst service on earth

I have had my Tax Free portfolio with Old Mutual since 2016 , last year I decided to lower my premium it was I sent forms immediately after taking to a customer agent - Blandley February this was in September - my premium was not changed even after I called, I called again and only in December was it changed. In December I requested a part disinvestment , then they completely canceled my portfolio . Then after an investigation they realized their mistake and in January reinstated my portfolio and I was able to transfer the funds back , they then went deducted my premium for January incorrectly... and when I call there is no history of my portfolio, endless emails and call. I have never seen such incompetence in my whole life.