Unable to sign into login

My department has a website that I put together a while ago that my boss had decided to rename. He moved the website over to a new URL but since I had customized it so much, the website didn’t work. In order to troubleshoot, I was hoping to transfer the site back to the original URL first. While doing this, I’ve somehow locked us out of admin for both sites. The new site no longer works and the old site redirects to the non-working new one. I cannot sign into the login for either.

My wordpress knowledge is limited to working on this site, thanks.

Old URL: phorid.net/zadbi
new URL: tropicalflies.net