Lenovo — Faulty products provided by lenovo

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Mumbai City, Maharashtra, 400080

I Joel rodrigues brought a lenovo K4 note onluine (AMAZON) in may 2016.after 2 months my Phone automatically shuts down and never turned up. I took my phone to service center .Even though my phone is in warranty they asked me to pay for the charges which is 1500.Later after a week i once again visited to thge service center and this time they infortmed me there is a problem with the display and battery and this time they asked me to pay Rs7600 .My phone costs of Rs12000and its still under warranty but i was not comfortable with it so my phone is still off . my issue is yet not resolved . if this is the case ill have to take a serious action and as well i have videos of the phone getting shut down . please look into my matter . please revert me back on [protected]@gmail.com or [protected] before i take strict actions.