Files being deleted from FTP>> hacked

@vids Contact your host as a matter of urgency, it is unlikey to be WP causing the problem.

Hi Timothy. I did. They are not sure themselves.

@vids – that is quite concerning, have you got a lot of plugins running? I would disable these if you are concerned about this.

wp-blog-header.php was just deleted. Again. FTP logs show nothing.

@vids Have you deactivated all your Plugins?
Maybe you could paste a list of your current plugins on here so we can check them out..

@vids, you could have malicious script hidden anywhere on your site. You can try to find and eradicate it/them but the only sure way is a complete wipe and clean install and restore from clean backups. See FAQ My site was hacked

Unfortunately @bcworkz advice may be the only option is this keeps continuing..
The link provided is very good though, have a read!

time to update and change your password on you C panel & your FTP