Samsung / Mobile Sgh - F480 — not replacing the mobile as it is in warranty period

i had bought new Samsung mobile SGH-F480. within six month from the date of purchase its touch screen stops working properly. when i go to samsung service station Bhubaneswar. they denied to replace it and require ATLEAST 3 MONTH to repaire it. So if i buy product and it does not funtioning properly and i have to put it for atleast 3 month for repair then SAMSUNG should not lunch such dilapidated product. there is no right to cheat the consumers.