Disha Eye Hospitals — Unauthorised charges of Rs. 5500/-

Address: North 24 Parganas, West Bengal

On April 2nd My mother had an cataract surgery from Disha eye hospital. I applied medical insurance (UHC Parekh). Authorization amount was Rs. 21000/- for that surgery, but hospital mentioned Rs. 26500/-. In the approval letter o[censored]HC it was clearly mentioned that the hospital can not charge any extra amount from patient other than authorized amount of 21000/-. but on the surgery day hospital charged a amount of Rs 5500/- from me and mentioned the surgery will be on hold if I don't pay. Please help me on getting back my cash of Rs5500/- which was taken illegally. I am attaching "Actual approval letter", "Highlighted approval letter", and receipt of Rs. 5500. Many thanks.