Student medihelp

I took out a student medical aid for my daughter in 2023. As she is a student and not working all payment done by me as parent which I stated when I app****. I got communication of increase etc but now this month I got debited R2000 more because we did not submit proof that she a student. I have not received any communication requesting it via email or sms. All they saying is that communication was sent which I definitely did not receive. Why would I not submit proof if she registered beginning of the year already and pay so much for student that hardly uses the medical aid. So frustrated with service