FAULTY HITACHI AC DELIVERED BY SARGAM ELECTRONICS, MODEL TOWN, DELHI

Hello,
We have purchased one 1.5 Ton Hitachi AC from Sargam Electronics (Model Town, Delhi) on 6th April, 2012.
Dealer (Sargam Electronics, Model Town, Delhi), delivered us a faulty Hitachi AC (Faulty Display Panel with Incorrect Display).
Dealer sent accross their fitting/installation representative at our home and after completing installation he tried to fool us.
As per him “Hitachi AC do not have a display (Temperature Reading and other display)”.
On calling Hitachi Customer Care they told us to contact Dealer to change the Faulty AC.
Now dealer is telling us that they will not exchange anything, also Manager is using such rude language with a customer.
Please help us in dealing with such bad dealers so that they can not make a fool of their customers.
Also this dealer had cheated us before as well. He charged us Rs. 1500 for a washing maching stand worth Rs. 1083/-, which he gave back to us on arguing.
How a person can charge more than maximum retail price.
Also this dealer has delivered a used 360 Degree Whirlpool washing machine at our home, which he has exchanged when we told him that this is a used mahine.
Thanks and Regards,
Suman Madhan
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