Hello @RT !
Welcome to Microsoft QnA!
I see your issue is with Office 365 on your laptop !
Please have a look : ( https://www.microsoft.com/en-AU/microsoft-365/p/office-home-student-2021/CFQ7TTC0H8N8?activetab=pivot:overviewtab )
Once you have purchased Office, you can install it from the Services & subscriptions section of your Microsoft Account page.
Go to Office Support for more steps to download, install, reinstall, activate, or update Office.
So log in with your University - Student Email into Microsoft Account from the link above
You will find out whether you are eligible for the Office Student Version and you can re install it !
In case you dont find solution to your issue come back with your feedback !
If this helped kindly mark the answer as Accepted and Upvote !
I hope this helps!
Kindly mark the answer as Accepted and Upvote in case it helped!
Regards