You're likely restricted due to enabling Facebook/Instagram Shops in an unsupported country via Shopify.
1) Contact Support via Direct Links:
Try:
- facebook.com/business/help/support
- facebook.com/business/help/contact
2) Use Meta Business Suite Mobile App:
Sometimes chat support is visible only on mobile.
3) Dispute Payment Restriction:
Use:
- facebook.com/help/contact/649167531904667
4) New Account Strategy (Last Resort):
- Create a new profile
- Wait 30 days to create a new Business Manager
- Don’t reuse old payment methods or domains