PVR Cinemas — force to buy food combo with ticket

Address:

Silver arc , near aarti cinema Ludhiana, Ludhiana, Punjab, 141001

Hi,
I just reached here in pvr cinemas which is located in silver arc ludhiana. At ticket counter they are forcing us to buy combo with ticket otherwise refusing to gave ticket. Upon asking about in written they told me if you want to buy ticket food is compulsory otherwise you can go to other cinema.
Why we are forced to buy food which is already higher than market rate please look into this matter.