Bespoke Travel Greece

Hello i have already one Joomla 3.5 Webpage but i have problem to register a new user,to virtuemart one page check out and to taxibooking component to run into the site. One page checkout error 'Error submiting registration form (registerCheckout). Reload the page and try again.' And the taxi booking go to the last step by he dont finish the booking. The secont one is i have one virtuemart calendar plugin and i need it because the site sell excursions and need the booking day but it's not run (i publish the plugin and working from custom fields into to virtuemart) and one false in virtuemart phpmyadmin 'virtuemart vm users.user_is_vendor = 1'. And the last one i want to unpublish the product zoom for virtuemart because hes go out of space. The main webpage url is [login to view URL] The onepage checkout i buy from [login to view URL] The taxibooking component i buy from [login to view URL] The virtuemart calendar i buy from [login to view URL] (the standard version) Maybe can anyone to help me to config and make that page to work. The template i make it in themler. Thank You.