Get my Account back

So a while back I merged my personal account to my mother’s account because hers had my Xbox registered on it. Now that I have a PC of my own it’s making it tough to do things bc constantly have to be signing into her account to use my personal PC effectively. Is there any way to un merge our accounts? My other soulution I though of was trying to find a way to complete unregistered my personal account and start from scratch essentially (which is ok bc I don’t have anything saved in onedrive or any configurations I’m worried about). Does anyone have any solution? Or a way to talk to a real person on the phone who could help. The standard number I found was just an awful robot assistant that lead me to a website that didn’t help so a real person would be so much nicer. Thank you all!