Medi Assist India — Improper review , hence delay in claim

I have provided all the bills for my father's cataract surgery . The hospital has provided the room rent bill and operation bill on the day of admission. On the day of discharge, hospital has provided the split up bill by mentioning the date and bill receipts details for admission date. But Medi assist team is not processing the claim, further asking for pre-numbered receipt for admission date.
Date of admission:10/3/2022
Date of discharge : 11/3/2022
Claim ref:[protected]
I need reimbursement for the claim