[HELP] Pin Reset.

I've forgotten my Pin that I entered it some days ago. Following are the situation that makes it impossible to reset without loosing data:
-Phone isn't rooted.
-USB Debugging not enabled.

Phone Information:
-Phone running Marshmellow
-Model number: AQ4501

What I've tried:
-Flashing recovery through fastboot mode that I can flash Password reset zip file. (Error while flashing recovery)
-Used Android Multi Tool to reset password, it shows device, but doesn't remove pin.
-Tried recovering data like contacts, messages, but it doesn't help.
-And much more to my knowledge.

Please help me out... without resetting phone data.
Thanks A Lot in Advance...

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