Coolpad India — leeco coolpad cool 1 4gb

I have just purchased this mobile 2 months ago from amazon and it hangs and lags a lot it is disappointing me. I also see colour variation in the top side and the bottom side of the phone
And also a very thin line in the downside of the screen with this condition how could i use my phone... It has 4 gb ram still hangs a lot at times i think of throwing this phone.. Its service centre in odisha is in bhubaneshwar.. So couldn't go to it for my problem and also call doesnot forwards to your # call center...😥😡