Old School Hot Rods Apparel

I hired someone through Fiver over a month ago to build our website, linking Printful to the shopify store. I plan on drop shipping apparel & accessories via Printful. It's about half way done & can't seem to get the other half done. Product templates have been uploaded to the store however there are some errors. The store is still in the free 14 day trial period. I can't seem to get the freelancer to respond & may have to file a complaint with Fiver. What would it cost to finish the work? He also entered himself as the store owner from what I can see, do I just need to start over? https://oldschoolhotrods.myshopify.com/