Sri Balaji Action Medical Institute — Careless approach of administrative staff/lack of knowledge/mismanagement

My husband Sri Ganga Sagar was scheduled for URS surgery for kidney stone referred by northern railway panel on 04/10/2021. My husband is entitled for semi Pvt room. But inadvertently on refferal prescription, we had approved for general accomodation. But we were not aware of the this fact.
For pre admission tests to get surgery appointment, my husband visited the hospital on 28/09/2021 and shown this refferal, and Accordingly given all relevant test samples. On 30/09/2021, alongwith all test reports, met doctor to get surgery date. And hence surgery scheduled on Monday i.e. 4/10/2021. But till then nobody not even Mr. Dev, the dealing personnel for panel, had noticed this accomodation error, however he checked all other details like which test is in panel and for what test we need to pay.
We had told to come at 7:30 in the morning to accomplish admission process. We had reached hospital on time and accomplished all admission formalities and we had allotted semi Pvt room.
As scheduled, my husband was prepared for surgery and medical staff took him to OT around 10am.
After that, around 12:30pm a staff come to the room and said that we are not entitled for semi private room and we have allotted you economy room. I was shocked because I had personally enquired about the room entitlement from the lady sitting on admission desk. And now when my husband was already in OT, they asked me to shift the room or more appropriately category from semi private to economy.

My only grievance/complaint is that why this is not informed me at beginning of whole admission process. At that we have time to think or make choice. But now when patient was already under process, I was not left with any other option but to pay the difference on whole bill.
I felt betrayal. This is not done. I am unsatisfied up to my neck. it doesn't matter to me that at which level this mistake occurred but the only person who is paying and bearing all this is me. I will never come to this hospital again not recommend anyone else.