Term insurance policy declined after few months

Dear Beshak Team,

I bought a term insurance of 1 CR. Insurer did medical test and all and issued the policy, but after 3 months they declined the policy and refunded back the premium. They just informed me that they found some ailment in background check but what exactly, they didn’t tell me even after multiple requests. Fact is, I have none. The insurance agent unofficially informed me that my H1Ab level (three month sugar level) was 6.7 and that could be the reason ( he internally checked that ). Hearing this, I got my medical examinations done myself and I found I don’t have that level of H1Ab even now (it came as 5.8) , it seems all normal. I guess that was a wrong result in their medical test then , but even if it was 6.7 of H1Ab it can’t be a basis of the decline of the policy, as some online search indicates that’s a okay level of H1Ab and insurer considers that level fine.Don’t know what should be my next step now. I am really keen on getting a policy from a different insurer now but not sure if they would too decline it or will charge a higher premium as this one was declined. Any input will be highly appreciated. Thank you 🙏