I’ve done the same thing in the past. I had to access my database directly on my hosting server to change the URL in the database. If you go to your hosting company’s control center, you should be able to log in to your database and will likely be able to access it via phpMyAdmin.
If you have phpMyAdmin available, log in with the username and password in your wp-config.php file. On the left nav bar, click on your database to select it. Once it loads, click on your options table (the default name for this is “wp_options”. Once your table info loads, click the “Browse” tab at the top. You should see your url near the top of the listings.
