"My child's delayed diagnosis"

My daughter is 14. She had grommets as a baby. We weren't given enough warning about possible side effects. We knew as a toddler she couldn't hear, the nursery, and health visitor and then the primary school agreed. She had speech therapy from 2. 5 years old. Why then would the local consultant refuse to accept our views and say she had no problem. Shouldn't my daughter be entitled to compensation but we don't know how to go about this. Thankfully we eventually asked for a second opinion and she now has two hearing aids and is at a special school but that's never going to make up for her lost education.