*** medical insurance

I went to Dischem clinic on the 25th Friday I took my son for his 14 weeks immunization injections and the nurse wasn't helpful at all. I was told the medical insurance doesn't cover his immunization injections. I need to pay R2400 cash, I asked her what does it cover I was told flu vaccine from 6 months to 36 months. I need authorisation. I asked her from who she never said. I want to cancel this thing it is useless