Apple

My Mother and Apple Support have messed up her iPhone & Apple ID
My mother's iphone got locked out..full security lockout.
Instead of calling me first, she panicked and fully locked it.
In talking with Apple Support, they seemed to have just set her up with a second Apple ID. Her phone uses one based on her old aol email.. this new one that her ipad is on is based on her yahoo one.
KNOWN INFO:
The AOL one's trusted phone number is the iphone #. When I try to enter it into the iforgot.com recovery system, it just doesn't do anything though (it IS the one it's asking for)
The yahoo one's trust phone number is the house line. It will call the phone and read out a security code.
We can get into her AOL mail, and her yahoo mail with no issues.
We can log into icloud.com with the yahoo based one. It lists the ipad, but NOT the iPhone.
We can not log into icloud.com with the AOL based one, as the password seems wrong.
AS the password is wrong, I can not just get the iphone to Fully erase and start over from the iphone itself.
I have my open iphone and ipad and laptop to do stuff with. Because of the trusted phone number issue I mentioned above, the "reset someone eles's apple id fucntion in the Apple Support App isn't working.
QUESTION:
WHAT IF ANYTHING CAN I DO BY MYSELF TO RESET THE PASSWORD ON THE APPLE ID THE PHONE IS BASED ON?
IF I CAN NOT FIX IT MYSELF, can the verizon store (it's a verizon iphone) help me or do I need to go to an Apple Store specifically.