Shopify Expert for Wordpress to Shopify migration

We are looking for a professional preferably part of a small company so that ongoing back up and support can be offered, to quickly migrate our WordPress site to shopify as there is a number of items broken. All data and images can be pulled straight across, there will be some customer design required so as to match as close as possible the existing site (improvements accepted, as long as people realize they have arrived at the same site).