Shop — product sell high rate (on printing rate)

Address:

D-62 sarswatinagar near nwr, Jaipur, Rajasthan, 302017

One shop seller cheat the customers. He sell products high rates (Just like milk chach) or dairy products
. He sell products in malviyanagar jaipur (In sarswati nagar) near nwr block d
Please do something. He fudge the customers. He is a mini shop seller. I am a student, when i bought a 500ml milk he take me 22 tupes but this product rates are 21 rupes (Saras product) and when i bought two chach, he takes me 28 rupes but original rates this products 26 (Quantity 2)
So do something this seller