Indoor case papers

Hi, I was treated for covid-19 in Chalmeda Anand Rao institute of medical sciences, Karimnagar, Telangana. Post treatment, I claimed for insurance with my insurance provider & they asked for ICP ( indoor case papers). The hospital denied to give those papers saying the papers are in an isolated room & need 30 days of time to fumigate the papers as they could be infected with the virus. My insurance provider is going to reject the claim as ICPs are mandatory for them. Please let me know how to handle this.