Hello I have a office365 SMALL BUSINESS tenant.
I have deleted a site, but I need to recover.
I have read this. to recover:
Navigate to the SharePoint Online Administration Center page.
On the ribbon, click Recycle Bin.
In the Recycle Bin, select the check box next to the site collection that you want to restore.
On the ribbon, click Restore Deleted Items.
But I don't now how navigate to SharePoint Online Administration Center page, I have the office365 Small Business, so maybe some things are different from Enterprise version.