Apollo Pharmacy — No change available in store so cut down on medicine supply

Address:

Apollo pharmacy, diamond park joka, Kolkata 700104

I was purchasing some medicines for my father who is 68years old. When purchasing the medicines the bill was ₹220 and I handed over a ₹500 note and then I was told the pharmacy did not have change so they reduced my medicines to make the bill below ₹200. I mean is this some kind of a joke?
Kindly look into this matter before I take it up in the consumer court here as pharmacies can’t stop giving medicines because they don’t have change