Canon A590 Is — cheating in rates

i have purchased a canon camera (a 590 is) on 31-10-08 from ezone lucknow and the cash meme no. is- T12/4975 and i was told the rate of this model in catalogue as 10995 nad later when i purchased it for rs. 9798 i forgot to cross check the rates on the product box whic had MRP=RS.9995.

this was really disgusting and i will take whatever actions required as i feel cheated that too in a reputed showroom.

so just teel me what should i do