Staff occasionally look in, but this is primarily a user-to-user forum. @PinkElephant's point, I believe, is that when creating the new notebook in the Web client, you may have accidentally logged in with a different email address, which would very quickly and easily (unfortunately) create a new account. So yes, it would be a completely new account, and that's where the notes you created at that time would be. Depending on what email and password you used to create it, it might not be obvious how to get back to this account. You may need to try every email address and password you might have used--being careful not to create yet another new account!
You can go to https://help.evernote.com/hc/requests/new/mcdvoice survey to create a support request. I'm not sure what options will be available to you on a Basic account. If the notes are important enough, it may be worth signing up for Premium for just one month so that you can get full access to support and they can hopefully straighten this out. At the end of the month, you can simply drop back to Basic.
Lost my notes
in General Technical Issues
Posted
Interesting stuff to read. Keep it up.