Aditya Birla Capital — Health Insurance Policy

My parents purchased a health care policy from ADITYA BIRLA CAPITAL since 2017. My father was hospitalised in 16th December 2021 for GALL STONE SURGERY for which the company issued the claim without any drama. Now again in 17th July 2022 my father was hospitalised and diagnosed with ADENOCARCINOMA. This time the company denied the claim multiple times giving the reason that my father has a history of hypertension since 2015. The doctors also gave them in written that the hypertension is not the cause of this disease and also my father never went for any treatment related to hypertension. I requested the company multiple times to sort the issue but they never listened. I asked them multiple times to justify in written how did they approved the claim in December 2021 for the same person without giving any invalid reason and now they are denying? The history should be same then though. But I got no justification from their side. I also told them to close the policy and not to deduct anymore money but they didn't listened to me and keep on deducting the money. The installments paid to the company were never due. My father is on Chemotherapy right now and we are repeatedly requesting them to settle the claim.

Now the resolution I want is:
1. To settle the issue as soon as possible.
2. To compensate for mentally harassing a cancer patient and his family mentally.
3. To close the policy and refund the money which they have deducted after I told them not to.

I am attaching all the necessary documents regarding the treatment.