[Resolved]  Washing Machine Videocon Model - Dolphin 6. 8kg — Not proper bill and rates

I purchased washing machine semi automatic videocon model - dolphin 6.8 Kg from Sigma Electronics Narwana Bazaar, Yol Cantt, Distt. Kangra (H.P.) and paid Rs.7680 as per bill No.7376 dated 08.03.2009. I was told that the above price is accrding to C.S.D.
I have doubt that the dealer is authorise to sell as per C.S.D. even then the rates are higher than as per C.S.D.rates.
Moreover the bill is not showing the details of the model . Only W/m 6.8Kg videocon is indicated in the bill.Why they do not show the model no.and their details?When I approach to make details the dealer refused to do so.
I request that if the dealer has sold me the washing machine as per C.S.D. he should give me at the C.S.D.rates and thus extra amount should be refunded.