Shopify Facebook Instagram Integration

I have tried unsuccessfully to integrate my shopify store with Facebook and Instagram without success. I have publishing errors and item issues. I am unsure how to fix my ad account issues and product issues. I have tried to start another business manager but am stuck where I cant remove my ad account from another business manager to etc. I just dont know what I am doing and cant afford to ask for a review until everything is fixed perfectly. I need someone with experience in fixing these issues and know what to do to to fix all y issues with Shopify, FB and Insta.