Malformed Page

Hi,

I am new to wordpress. Just starting to get the hang of it. I ruined my website however. I can’t even login to wp-admin. The pages are totally malformed.

http://caribbeanequipmenttraders.com/

I inadvertently entered the wrong url in the wordpress address url field under general settings in within wp-admin. How do I undo this? Anyone?

Thanks,
Donrick

https://wordpress.org/themes/page/