Bombay Hospital — Wrong billing

Address:

301,3rd floor, Meer Apt, Arab lane, mumbai 400008

I, Shadab Patel younger brother of Shazeb Patel who was admitted on 3 May, 2021 and discharged on 11 May 2021 at 10 am. I was told by the billing department that they won't be charging me for 11 May 2021 as you are discharged by 10 am at the time of final settlement. And also told that if you have any disputes relating to the billing you can come afterwards and you would be provided resolution. Now on 13 May, 2021 when i was checking the bill the hospital authority has charged me for 11 May 2021 and when i went to they regarding the issue they reluctant to solve it and are saying that once settlement is done we don't do anything. Please let me know if you want to resolve the issue and require any documents relating to it. Is the way a hospital loots patient?