I don't have multiple accounts and I'm not banned or locked out of mine. My Mom's satoshis are just gone.
I don't think this is a multi accounting issue too. Otherwise, freebitco.in would have banned your account and you wouldn't be able to access it anymore.
Since the funds disappeared just like that, it's possible that your mom's account got hacked and the hacker stole the funds. Did you verify this possibility by checking the account's transactions history?
I've stated plainly that I'm not very techy. I don't know how to use a forum and I barely made it here.
You don't need to be a tech savvy person to figure out how to send a personal message on this forum. Just go to
"MY MESSAGES - > New Message", fill in the username of the user you want to contact (TheQuin) and send him a link to this thread.