Hitachi Summer QC

Sir, i have brought this Ac from 'Choice Electronics Laxmi Nagar' on 24/5/2012 just after its installation its stoped cooling and started giving too much noice.i filed a complant in customer are then they send some one after 4 days and that person without investigation the issue has said that the gas has been leeked out and were forceing us that he will take the unit with him and willfill the gas but we did not allow him as the ac was totally new and how come this isssue can be arisd then some how i got the number of MR Mukesh sharma (9582777051) and talked to him he and told him that i nee