Hello there,
I have gone through your project detail, you have prestashop website thats currently down and goes down often, you want to fix, also update the prestashop to latest version.
Relevant Skills and Experience
We are a 10 year old IT company with highly skilled designers and developers to work on php, Mysql, Jquery, Wordpress, prestashop, Magento, OpenCart, Mobile development, iPhone, Responsive etc.
Proposed Milestones
$50 USD - first initial payment
$130 USD - on final
Stay tuned, I'm still working on this proposal.