If it’s a new page delete the business page. This takes 14 days but you can create a new page in the mean time. In commerce manager delete your ad accounts and unlink it from your instagram.
On your instragram make sure you have a business account and have all you information correct, In the personal information part of instagram make sure your email, phone number and DOB. Make sure you have your website listed in your BIO and make sure your contact options are fully completed, email, phone and address. I’m not sure if needed but try have your facebook and instagram page called the same. So you insta handle should be the same as your facebook page name.
On your website make sure you have, privacy policy, shipping policy, returns policy, payment policy, terms and conditions links in your footer. Make sure your address and contanct email and number is also listed in your footer. (More for google sales channeI think).
Create your new facebook business page. Follow the steps and make sure all the address info, contact info etc is complete. Upload a few posts.
Install the facebook app in shopify and when you get to the part about the commerce manage try to create a new one and if that won’t work use your personal facebook account as the commerce manager for everything.
That’s pretty much what I did and I was surprised it worked. I had given up but then an email arrived saying I was now approved. It arrived probably a few weeks after me doing all of this. My old facebook page was in delete mode and once the 14 days expired I deleted it.