Build an Online Store

my companies e-commerce site is [login to view URL] it's a magento site our developer has left and is not returning. There is a problem with the site as you can see. I need an expert to get into the site and rectify the problem so its live and then going forward I need a quote for a maintenance agreement going forward - but this is separate to getting the site up and running - once we have selected a freelancer we will hand over access codes etc.,