Convert Website to Responsive

hello, I want someone with experience working with code in Responsive Website. I want website to be responsive manner. it display on all the devices clearly.. I don't want this site to be down anymore.. be careful while making it responsive. a site is built in Joomla cms. This site needs to be complete by the end of this weekend (Sunday). if you think you can make it then please bid according.. no extra time.. keep in mind please. Lowest bid recognize. thanks cheers!!!!!!