Apple India — touch screen is not effective

Address: New Delhi, Delhi, 110017

My i phone touch is not effective, i have been using iphone since it was launched... But not i am not satisfied with the product quality... Just a year back i purchased and now dealer are saying to spend 12 k for touch screen.
It is rediclous for one of the world best company looking for money rather services.
This would be my last mail and if not sorted, i will switch to other smartphones

Thanks
Lalit