Big Problem T_T

I have a big problem with my wordpress!

My english is bad 🙂

I change the url of the site in options, i change http://www.psptek.arthabitar.net for http://www.psptek.net and now i cant enter in wp-admin or wp-login or change anything in my site 🙁

if you see my site looks so cool xDDD

Hey and i cant erase the wp-content file in my FTP i cant erase the cache or anything in that file 🙁

And i dont know how to acces to the database cuz is localhost anyone know how to enter in a localhost?

Yes im a newbi 😀 thanks for ur help wordpress is amazing 😉