I Screwed up my WordPress site. Help please

Hey Guys,

WordPress site: http://www.neorussell.com

I have hosting for my other site http://www.soulcalibur.ca
I am using soulcalibur.ca’s hosting to host my wordpress blog.
so the actual address is http://www.soulcalibur.ca/neorussell
I was doing a domain forwarding so that when somebody puts in http://www.neorussell.com, it forwards to http://www.soulcalibur.ca/neorussell

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I was doing some spring clearing i happen to see an option to change the address to from http://www.soulcalibur.ca/neorussell to whatever I want.
I changed that information to http://www.neorussell.com since I don’t want people to notice I am just forwarding.
I know I shouldn’t have touched anything in there.
Sorry for my stupidness.

I can’t get into the admin anymore.
I get this error:
403 Forbidden

nginx/0.7.6

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I think the problem was that there was an option that allowed me to change the actual host http://www.soulcalibur.ca/neorussell to whatever i want as stated in that page. Here I am thinking, i don’t want them to see that address. I then changed the address to http://www.neorussell.com
Now my blog is shot. I think I changed the hosting where the site is being hosted and that is whats causing the error.

How do I fix that error I did?
I know if I just put back the original hosting address, it will fix everything but I cannot get into that page anymore.

I’m stuck in this login page.
I used the same login information to login and nothing.
I try to send the password to myself and nothing as well.
I keep getting that error.

Any help. Thanks for anybody who responds.
NeoRussell