Can't Login to Authenticator App

I am unable to login to my Microsoft 365 Business account, because I'm unable to login to my Authenticator App. 

I am also the only administrator on my business account, so no one in my organization can help me. Microsoft online support and phone support just keep sending me in circles. The only way I see to create a support ticket is to login, but my issue is that I can't login. Help, please!