Lost login information

I cannot log in to my website. The website in questions is http://www.surgefront.com, the log in page is http://surgefront.com/wp-login.php. The username and password I was given do not work, and when I try to change the password, it says that the username is invalid. Thus, I don’t think that I have anything right here. No one in my company knows how to fix this. Most likely, the correct username, email, and password were lost amongst the long lists of log ins we have (all of which I have tried). Are we destined to be locked out forever? Thank you so much for your help.