Facebook & Instagram

There is a serious issue re the integration of Facebook/Meta verification for my store. I have now spent over 1 week trying to sort this and spent over an hour in a phone call with Meta direct via the Shopify 'Help'. Meta themselves claim whilst they reset all my details and asked me to resubmit the same impasse results so I am in an endless loop with a store that whilst the catalogue connects will not validate my FB and Instagram shopping links which without the store is worthless. I am left not knowing what to do?