I broke my homepage....

Hello, I completely broke everything by trying to use a MS template. Before I tried using a template, my home SP site URL was :

https://centercalprop.sharepoint.com/sites/ccp-connection-home

After trying to use a template, the URL is: https://centercalprop.sharepoint.com/sites/ccp-connect/SitePages/Home.aspx

And completely messed up. How can I revert to the original???

Thank you in advance,

M