Unprofessional Conduct & Bad Service

I joined Bonitas Medical Aid last year 01 December 2015. I did not know that their medical aid was a membership in advance medical aid. In January this year I was advised by my HR that they want to deduct R7911 because of this membership in advance scheme rule, I immediately tried to reach them to make an arrangement. Eventually my HR was able to find them. We made an arrangement that I paid R 5411.00 for 3 months til the 15 March 2016. To my utter surprise, Bonitas deducted the whole amount of R7911 in Feb 16 as if I had not made an arrangement. This put me in such financial distress as it was a day before my salary was paid out so there was nothing my HR could do. I immediately contacted Bonitas to process a refund on the 15 February 2016. Zandile Methula advised me that the refund could only be processed after reconciliation had been done. I have been waiting since then for them to process a refund. I find this highly unacceptable because Zandile communicated to me on the 08 March 2016 that they are going to process my refund but todate I have not received the said refund. I want my refund and I want to cancel my membership due to consistent bad service received.