Max Hospital — I have been cheated regarding treatment

I have been doing treatment of the dad in max saket since 2015 and this year again we have to go to max saket for treatment for cancer as the doctor told us to we need cyramza medicine for the patient so the doctor made me to meet one vinod in oncology department who usually gives appointment to patients for daycare treatment. As doctor clearly had mentioned in the report that we need to give 400mg of Cyramza but when i went to get it from max they made me pay for 500 mg and aftr the first cyramza dose i asked vinod and also the max pharmacy guy why i was made to pay for 500mg cyramza when doctor has mentioned only to give 400mg they didnt gave me any answer. I paid Rs. 2, 31, 778.80
For the therpy and the receipt that is with me shows 500mg and doctor prescribed 400mg. And interms of the price difference between 400mg and 500mg there was price difference of Rs.49, 000. I have been paying max saket since 2015, neither was i having any panel or insurance . It hurts when some reputed hospital like max cheats you and takes away your hard earn money . I dont know wheather max hospital will respond to my allegation or will they just keep mute like their employees did when i asked them . I tried to contact the zonal head but was not able to, but now i have been left with no other choice other than file the case in consumer court regarding this. I am attaching bill of cyramz which i was made to pay for and the prescription of the doctor as well