Inconsistent practice

I have been going to Premier Health for 3 years. Always using the same 2 doctors. Today however they were not available so I opted to go with a different one. On arrival I was told that she is a cash only doctor. I have been using my medical aid at this centre for years. I find it very unprofessional that they didn't make this known in advance. I didn't have cash on me so I had to leave. I am now still sitting with an eye infection and I can't get the time back that I wasted.