How to unlock screen lock pin?

I somehow mistakenly confirmed screen lock pin and now do not remember the pin that I had put without my conscience. I use Android 5 version Lollipop , model CLoud power plus of Intex. Tried almost all methods. Android device manager, but it doesn't help as my device isn't located and hence I am getting no response. I tried calling from another number but whenever I tried to go back immediately my phone again asks for pin. Factory data not possible , cause I am unable to reach to my settings button. Please suggest any other hack or suggest something very useful to bypass Android's lock screen pin.