Windows 10: how to regain access to sensitive account info

I cant access my account. I finally waited the month to reset my phone number, but I had to sign into microsoft to do something else at the time, so after I reset it and it told me I had to wait another 30 days for it to take affect, I went back to login so I could access my subscriptions. And then, with no warning, without it even ASKING ME, it cancelled the request to change my phone number. Just said it cancelled it. Done. WHY. I need a way to re do the request, because now it has been about three freaking months of me trying to change this stupid phone numbers because of all these security

:)