Failure to pay claims

My name Bawinile I am a member of Bonitas medical Aid since May 2014. At the begging of this year I was given a limit of R12,640.00 for Day to day and a separate R5000 for GP's. On the 16th of September I took my son to pediatrician and later I collected the medication as usual but I was so surprised to be told that my medical aid was depleted I checked on the self-help service I had a balance of R2,988.60. I just thought it was a technical error and I bought the medication by cash (chronic medication was given I did not have a problem with it). On the 25th September I called the Bonitas and I was told the medical aid was exhausted and the funds that were remaining I can only use them for GP, we argued with call Centre agent because he couldn't explain why eventually I hanged up because we were not getting any were. On 28th of September I called again demanded that they should explain what happened, listen to this \Bonitas has decided to change/reduce the benefits for standard option members because they are ABUSING the funds"then my question is how can you abuse something that you pay for? How does Bonitas as a company reduce benefits and not tell the members? This is unfair """