Shopify Expert Required To Fix Feed Exported To Google Merchant Center

We have a Shopify store and are getting ready to launch an AdWords campaign. We are using Shopify's "Google Shopping App" to connect / sync the store with our Google Merchant Center. After completing the sync, the following errors are appearing for all products: GTIN missing AdWords labels not valid Google product category missing We are looking for a freelancer with hands on Shopify, Merchant Center and product feed experience to check the integration / sync and fix these errors. More than likely, the feed is probably missing a required column or the data to create a required column. You would need to check and fix this. As an additional task, you would also be required to: (i) Check that our Google Tag Manager code has been correctly added to the Shopify theme. (iI) Add our conversion tracking code to the Shopify theme. It will need adding on the thank you page after a purchase has been completed (instruction guide provided). Please put the word "shopify" at the top of your proposal so we know that you have read through this complete job description.