Extruder motor for elegoo Neptune 3 pro

Do you guys know a stepper motor that is compatible with Neptune 3 pro ?

Mine looks like it’s locked, it makes a short click but doesn’t move.

I try to open it but don’t find anything wrong.

So two questions, what motor can I buy to replace it ?

And there is a way to fix this motor ? Like, rewind it will make it works again ?

Thank you guys