Raksha Health Insurance TPA — During Hospitalization Expenses not being covered

Have submitted the claim with bills to the Raksha TPA Office on 18th of March but there is no update yet from them
Today I just had a call with Customer Care and from there I got to know that claim was denied because pre and post hospitalization cover is not there.
In claim there was 10422 INR during hospitalization because some medicine was not there in hospital and I bought myself from hospital TPA I was told that you can claim directly to Raksha TPA.
But There is no proper response from Raksha TPA they are ignoring my mails