Have you had your digestion checked? Are you absorbing protein properly? Is your stomach acid PH ok?
I'm asking because if your stomach is dumping partially undigested food into your small intestine you will never get rid of the candida. Even if you manage to beat the candida down for a while, it will be back.
The fact that your candida is not responding to treatment suggests that there may be an underlying condition. Your digestion is the first place to look for a problem. A bigger hammer (more powerfull drugs) may be unlikely to help you.