can i block russian visitors to website, as my site got hacked, all sorted now but want to stop any visitors for Russian
Most hackers use anon proxy servers so it would be pointless. Best you can do is plug the holes in your sites security, and keep your scripts up to date.
It is very important to block all the methods that are used by hackers: Use a good antivirus program to keep viruses off the PC you use to manage your website. Use long random passwords that have no dictionary words in them. Use only the scripts you really need, and research every script for security issues before using it. One place is http://secunia.com/advisories/search/. Keep all your scripts up to date. If you hire someone to write PHP, ASP.NET, or other server-side code for you, ask them how they will prevent RFI and SQL injection. If they cannot give you an answer, don't hire them. If you don't know how to prevent those things yourself, don't write your own code and put it on your site until you've studied those security issues. It is useless to try to block the people who you think are the hackers.
Very good suggestions. I think you use a software like Joomla, Oscommerce and others that are OPEN. This kind of software, if you are not everytime actualized , your script can be hacked. I have 8 domains that were attacked because they had inside it a joomla in and old version. Good lucky!