Aditya Birla Hospital — Poor response from Hospital staff on Claim

I am a serving Officer in Armed Forces and presently posted in Veraval city of Gujarat. I was admitted for medical reasons in Aditya Birla hospital on 4 Jul 22, present in the city of Veraval for 2 days.
I am in possession of ABC health insurance through which chashless was approved after a day of my hospitalisation. However i was told, and i paid complete amount of 20 K approx to the hospital. I was told that it will be claimed as reimbursement after 4-5 days. Its been a month and i have visited the hospital 3 times asking for status of the claim. They have taken a copy of my blank cheque, pan card and Aadhar card also, however till now no positive response has been given.
I have recieved a mail on my registered mail id stating that the claim has been approved on 02 Aug, further its been 4-5 days from then, the response from hospital staff is pathetic. Being in Armed Forces i do have less time to go everytime to the hospital in the duty hours. I have given my name and phone number several times to the staff so that they can give a call back to confirm if the cheque is ready for me to collect from the hospital. However very poor response has come from the hospital side, not a single call i have recieved from the staff whome i have been giving my contact details.
It shows a poor name of a esteemed group like Aditya Birla because of some employees not behaving properly & working the way they should work (they should at least work what they are paid for).
I am a pretty patient guy who usually dont complain regarding anything until unless some things are going out of hands. It is therefore requested that hospital staff may be reviewed upon of this above mentioned hospital for their work and performance being in a Aditya Birla Group and not doing what they are paid for. I will ensure that my claim of whatever amout will be given to me, but through this complain i want to convey my concern for the people who are not literate or well educated and keeps on running behind the hospital for their rights.
Regards