Charging Higher price than M.R.P

Location/place: Borivali west

Name of company/service: St. Francis institute of management and research

The person incharge of our college canteen is charging higher price than MRP on a product like appyfizz.

Appyfizz tetra pack : MRP 10 … Charges 11 rs. 1 rs extra for cooling

Appyfizz can : 20 MRP .. Charges 2 rs extra
for cooling.

I look forward to take some action as quick as possible