A local bus and wagon stop for travellers but due ...

A local bus and wagon stop for travellers but due to one reason I hated it. A shop there is charging more price than the actual market price of the products.for example if market price of a small pack Lays is 10 rupees, this particular shop in Karachi Company Adda will charge 20 for it. An action must be taken on them. I don't why the Islamabad authorities have been sleeping for so long as this is happening since long