Website update, security and webmaster services.

Site was designed with PHP, (my)SQL database, Subdreamer, Joomla? My website has been hacked multiple times. I need my PHP script updated to the newest version. I also need my contact management system updated. Than I need a review of the website to add any security measures necessary to be sure the site will not be hacked again. I will pay $100 for the initial work and am willing to pay more if the fix turns out to be difficult for some reason. I then need someone to perform general webmaster duties when I want to make an occasional change or have a problem. Please quote this as an hourly charge. I need to keep in daily contact until my issues are resolved. Please tell me how I will contact your company and how we will have an actual conversation if this becomes necessary. Please respond only if you have a good deal of experience with the above programs. The website is a simple ~12 page site with a contact page.