Why won't touch work on some parts of the screen of my phone?

my phone cannot touch...if you password number at you phone...have one line 456 that line cannot touch i must format my phone to open my phone...please help me or whatsapp me

Hello im amirul,why my phone cannot touch if you phone have lock screen password number,,,have one line 456 that line cannot touch..I use a7 not new 

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