A Microsoft file hosting and synchronization service.
Hello,
Your files shouldn't be deleted permanently just with a 2month gap, according to Microsoft, it is 6 months: https://support.microsoft.com/en-us/office/my-onedrive-says-it-s-full-f0a8a922-d971-497e-b0c6-7b9a47c617c0
When you go to www.onedrive.com, double check the user icon on the upper right, and make sure you are signing in using the correct Microsoft account.
If so, and your files are still missing, I would suggest that you dispute this with Microsoft support, because it shouldn't happen according to their instruction which I shared above. Go to https://support.microsoft.com/contactus, Type "Billing" and press Enter. On the next screen, click "Contact support" at the bottom of the page, then choose "Microsoft 365" > "Manage my subscription". You’ll then see the option to chat with a Microsoft support agent who has access to your account to help review the issue.