Official method
- Go to your Facebook business settings : https://business.facebook.com/settings
- Send your Facebook ID to your Index contact by email
- We will send you a Facebook invitation and you will receive a notification in your Facebook
- Please accept the invitation as soon as possible (invitation expires in 30 days)
Source : https://www.facebook.com/business/help/1717412048538897
Fallback method
- Use this link : https://www.facebook.com/business/help/195296697183682
Email: indexwebmarketing@gmail.com
Role level : ad account advertiser