[Resolved]  Dell — Seller Cheated

I bought a Dell Inspiron 3542 yesterday i.e 8 october 2014 from a shop called Dynamic Computer. The price they said was Rs. 38, 200 including vat. When my parents paid the money it was Rs. 38, 800 in the bill without any reason. I want the original price of Dell Inspiron on the above said date. They cheated and even I saw they took servicing charge of Rs 300 from a customer who was servicing it first time which was supposed to be free. They are just fooling almost every customer, so please take an immediate action.