urgent need to repair botched update of outlook on mac computer for dandana.us

I'm having an urgent issue with Outlook on my Mac computer. I've been trying to update it, but the update didn't work, so now I'm stuck. I'm currently using Outlook 2019 or Office 365, and my Mac operating system is macOS Big Sur. I tried to solve the issue by reinstalling Outlook, but that hasn't worked. So now I am in need of assistance to repair and restore my Outlook. I would love to get this issue sorted out as soon as possible. i'm using Sonomo 14.0. i can give access to cpanel remotely. also need to sync iphone13. all this worked before attempted update of outlook a few days ago.