Bad services Polmed/No service

I have send numerous emails to Polmed requesting them to deduct from my account every month due to me not always near a bank. In Heilbron postage is a disaster and bank statements are only received every 3 months. They post it every 3 months but we receive it more like in the end of that 3rd month due to one lady mostly on the counter and one in the back. Polmed send us a letter that they terminated our membership due to outstanding premiums. I have send all details - bank statement already last year in 2017 with a letter requesting deduction. I also complained even because my emails was not answered. Even until today no answer after I received an query nr after my email was send on 24th Of April 2018. My husband went of as a policman with his pension and medical benefits as part of his package. All of a sudden membership is terminated but the fault is in their side. How many more emails should I send - until today again as mentioned above email was send with proof of payments after I received the letter - my medical aid was not reinstated - no answer on emails - I even lodge an complaint to the medicalaid-board against Polmed at ********** What must we still do to get any response - as mentioned from last year emails was send to add banking details.