Update error for M365 apps on mac

No matter what I try my M365 apps (Word/Excel/PPT/OneNote/Outlook) won't update from 16.79 to 16.82. Your help would be very much appreciated. P.S. I am a computer user, but not an IT Manager. Thanks.

Specs are:

2023 Mac Mini M2 Pro, Sonoma 14.2.1

AutoUpdater version 4.68.1

Office365 Subscription (workplace), current apps are v16.79, and won't update to 16.82.

Things I've tried:

• Updating one app at a time using AutoUpdater
• Uninstalling/reinstalling all apps and re-activating.
• Updating AutoUpdater version
• Trying to update from both the Mac and Windows app store. Neither recognised that I already had the apps installed so I didn't have an 'update' option.
• Tried the 'MSUPDATE' process https://learn.microsoft.com/en-us/deployoffice/mac/update-office-for-mac-using-msupdate. The result was a "No such file/command" error in the terminal. 
• Tried the Terminal command here. Nothing at all happened.
• Tried switching off and on the "Allow in background" setting in Login Items on my mac.
• Changed my AutoUpdate 'Channel' from current to "Preview" and "Beta"