Username corrupted

I recently was hacked, my web-host fixed that. I have logged into my main site since then with no problem, but starting yesterday, when i go to my wp-admin page to log in, it says my username is not registered, nor my contact email. This is also affecting all of the pages associated with this site, they are getting a 404 error when I try to pull them up. These are critical sign-up pages that I need operational. I need to speak to someone ASAP to get this resolved. ALl of my other wordPress sites are logging in fine and recognize my username and contact email. Only the folowing https://travsbestdeals.com (plus it’s pages) is effected.