Broke link to URL

Hi,

So I created a wordpress site on my server at https://www.fredericdesign.net/bridgethegap. When the website was ready to go I copied all the files to the new address https://www.bridgethegapcontracting.ca. At first it seemed like everything worked fine but then after clicking on the links on the site I noticed that I was always sent back to https://www.fredericdesign.net/bridgethegap.

So I realized that I needed to change some of the links, first I changed the root url of https://www.bridgethegapcontracting.ca in the settings from https://www.fredericdesign.net/bridgethegap to the new one. This didn’t work, when I saved I was sent to a page not found, and now I can’t login to either of the sites, and have no way of reverting what I’ve just done.

How can I fix this?