[HELP] My Blog is down (WP)

sorry for my english is not my native language I hope you will understand me:
yesterday I add subdomain to my blog and after that the site didnt work, I delete the subdomain, his db and still..
when u enter the domain u will see only:
[h=1]Index of /[/h]
im host on hostwind and I sent them 3 tickets but they didnt responde me yet and I lose traffic because his down...
thanks for help

What is hosted in the root? (in public_html) ? If its another WP site, then first take a back up of your .htaccess, then delete it. Then login to your WP admin (it should be possible) and click on 'Save' permalinks. This will create a new .htaccess file which should be good.

Also check your cpanel to see if you have completely removed the sub-domain.

there is error in the wp admin.. like the blog is removed or something. Can I PM you please?
in the public_html there is only .htaccess file ...