Sorry bro. Did anything happen to it before that? drops or something? Users have had that issue when keep in pocket and pressure is excreted causing it to bend. I dont think  youll want to do an outside repair. It may be shoddy and Ive heard that updates can cause non original digitizers to stop working.

When did you get it?
Malaysian set?
When did warranty end?

Pm if you feel that it should be discussed privately.