Domain Name Change Led to Inaccessible Site

One of the people who helps with upkeep on our website changed the domain name from “penngleeclub.website” to “penngeeclub.com” because they believe we own both. However, in doing that, they’ve made it impossible for us to access the website, and we also cannot log in to change it back to make the site accessible. Essentially, all I think we need is for someone to change the domain name back to “penngleeclub.website” so that we can get back in and get it back up and running, but no one can get into the site right now.

Thank you so much in advance!

The page I need help with: [log in to see the link]