Installing and customizing theme for prestashop to make it fully loaded ecommerce site

We have installed prestashop on our website [login to view URL] , we have added few products to check the feature of online shopping, everything is working good, the only problem which we are facing is , we are not able to make it a fully loaded online shopping site, as we are facing issues in installing and customizing the theme, and adding products we are looking for some one who can install prestashop theme , and make it a fully functional online store, we are looking for some one who can customize our site and make it look like fully ecommerce site, for ex [login to view URL] We have no issues if you can install free theme, provided it should be fully functional ecommerce site,this task may involve designing the banners and logos too we are looking for some one who can make unlimited revisions for this task