Not getting warranty for my Samsung Tab within the warranty period.

Location/place: New Delhi

Name of company/service: Samsung Indi Ltd.

Hello,
I purchased one Samsung Tab last year in the month of august. And when i faced some charging issue then I went to the service center (Samsung Service Center, Moti Nagar, New Delhi) to resolve
this issue. But the service center people told me that the issue is out of warranty so I need to pay rs of 9000 rs. Now my question is If my product is under warranty then why I will pay extra money .
Regards,
Gyanadeep