Hello there,
I have read all your requirement in details and believe that I can do this development, customization and fix for you.
I am a full time freelancer with more than 4 year of experience in Core PHP, Wordpress, Drupal, Joomla, CodeIgniter, Laravel etc. I have inhand experience working with almost all the ecommerce platforms of PHP like OpenCart, WooCommerce, Magento, PrestaShop, Shopify and ZenCart.I have handful experience in HTML/HTML 5, CSS ,Graphic Designing(adobe photoshop).
Hope to hear from you and please feel free to ask if you have any queries.
Thanks