Not able to login to my account

I changed the URL and server of my website, and after doing so I have not been able to login to wordpress, the formatting has changed, and im not able to access the account through teenartgallery.org/admin as I used to be able to. How do I get in so that I can change the url? I would also love to know if there is a way for me to delete th site without logging in, as I want to delete it.