Amount taken more than MRP

I bought a “crack cream” 25 g from D mart(hinjewadi pune). On that MRP is rs.55 and they taken rs. 60.75. I have that bill and product both with me. Where I have to submit proof regrading this. And who will resolve my complaint.
I checked my bill so I complaint. Many customer don’t know this so how much profit they will take in this product from customer.