I am unable to log in on my MacBook Pro

Suddenly the cursor had moving by it own without I do it on my screen, so I close the website ( yahoo ) and log out and shutdown my computer. I have restart my computer to log in unfortunately it won’t log in. I need help so I contact Apple Support for call me back. Apple support had called me back and wanted me and me to selected number 1 to ready to talk now, unfortunately Apple support couldn’t receive it. I don’t know what to do? Please help! Thanks!

[Re-Titled by Moderator]