Hi RedlandCommunityCentre,
First, my pleasure to assist you.
As per your description, please don’t worry, we can work together to narrow down and resolve the situation.
Since, you mentioned, “A person fills out a webbased form (similar to google forms), that is saved on OneDrive.” Here is my suggestion. You may create a Microsoft Form (Use Microsoft Forms to collect data into your Excel file) in OneDrive via press the new menu and select Forms for Excel. And you'll see the latest updates each time you click Open in Excel or re-open the workbook and Import data from a Microsoft Form into Excel Automatically.
For reference: Create a form with Microsoft Forms
Your understanding and patience will be highly appreciated. I hope that you are keeping safe and well!
Best regards
Waqas Muhammad