Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Rebecca,
As per the issue description you after installing Project 2013 program Office 365 program got uninstalled from the computer and you are unable to view the program under MyAccount page.
Ensure to login to MyAccount page by entering the email address and password used to purchase Office 365 program and check if you are able to view Office 365 program under MyAccount page.
Also check if you have the email sent to you when you had purchased Office 365 program.
I hope the above information helps. Let us know if you need any further assistance.
Thank you.