Refunds not paid back

I had a medical aid with Bonitas. In the 'Waiting Period' for the 3 months prior to what you can use the medical aid they deducted over R9000. To be precise it was R9192.00. There have been numerous attempts to get hold of them and they instructed me to send a letter, which was sent on the 17th of April 2017. There was also numerous documents needed to and that was also sent to them. I wanted the medical aid to be down graded to maybe a Hospital Plan or something, but also struggled to get that done. I never used the medical aid. They also said that they will refund me the money, which NEVER happened. They are full of promises and nothing happens. So now I lost my money? I would surely still be wanting to be a member but with such treatment I don't know anymore. Please assist me to get a refund? Please contact me on ********** 729/ ********** 983/ ********** 468 Thank you, Henk van Wieren