Developer To Help With Facebook Commerce

Hello, I am specifically looking for someone who is a developer and completely understands ALL ASPECTS of Facebook Business Commerce Accounts and Shopify. Candidate must be able to fix my Commerce account in order for it to sync with my Shopify store. Take note, Facebook support cannot figure out why I am getting an error when I try and set up my shop, therefore this will be challenging. Also note, I had my FB Commerce account working fine for over a year, so this is extremely boggling to the mind. Please only apply if you are familiar.