Hi nidhiglory,
You’ll need to first sign in to the control panel used by your hosting provider. In most cases this will be something called cPanel. Your host should have given you the web address and the username and password for this when you signed up for hosting. (You can do all this via ftp but it’s probably easier this way.)
Once you’ve signed in, look for the File Manager which is something like Windows Explorer or Finder (on a Mac). When you open the file manager, make sure you choose to show hidden files.
In the file manager, you should see a list of folders on the left, look for one called public_html. Click on public_html to display a list of all the files and folders found in that directory. You should see a file named .htaccess, download it and then delete or rename the one on the server.
Before you do the next step, check to see if you can sign in at this point, if you still can’t, proceed to the next step.
Now, in the same folder, you should see a file called wp-config.php. This file has the essential configuration details of your site, you can read more about it here. Rename it to something like wp-config-old.php, but don’t delete it. In the same folder, you’ll see a folder named wp-config-sample.php, rename this file to wp-config.php and manually enter the Database Name (Database Name used by WordPress), Database Username (Username used to access Database, Database Password (Password used by Username to access Database), Database Host (The hostname of your Database Server). You should have these details from when you first setup your site.
If you’re still having trouble, the next option will probably be to install a new copy WordPress over your existing installation. Another option would be to call your hosting provider and see if they can have a quick look to see if there is anything obvious that they can help you with.
Please don’t post any usernames, passwords etc. here.
