Claim rejected because of a health condition happened 27 years ago
I have a health insurance policy for my mother which is 3.5 years long. She was admitted to hospital 2 weeks ago due to an emergency. During the treatment she realised she had a similar health issue 27 years ago and we disclosed it to the doctor.
We have not disclosed this health issue (happened 27 years ago) since i was not aware of it. I am a 4 year old kid when this issue happened. My mother also don't remember it since it happened very long ago.
The insurance company rejected the claim saying 'Non-disclosure of TIA' i.e., medical history not disclosed. I am genuinely not aware of this nor my mother remembers it. Now the insurer says they will cancel the policy.
What are the options for me?