Wife locked out of Microsoft account. We don't know what to do

I bought a new laptop for my wife two weeks ago. I got it set up for her and it worked. We saved a new password and when we went back to use it, the new password didn't work nor did any others. We've tried everything to get her back in. We've tried filling out Microsoft's form to prove it's her many times and keep getting notices that we didn't provide enough information. There doesn't seem to be any option now to get help. There is no phone number or any advice other than to submit a form with more detail. Can anyone help?