There is a limit to the number of messages you can send, the daily limit is based on which tier you are in.

• Tier 1: Allows your company to send messages to 1K customers per day.
• Tier 2: Allows your company to send messages to 10K customers per day.
• Tier 3: Allows your company to send messages to 100K customers per day.

Every account starts with Tier 1, the account will be automatically upgraded to the next tier if the quality rating is not in the red state, and it sends 2x the number of messages of its current limit in a maximum window of 7 days. It is currently not yet possible to check your quality rating in the MessageBird platform. 

Unfortunately, Facebook does not provide information on when an account has been restricted, because of this we cannot proactively inform you on this. If you believe that your account has been restricted, please contact our support team with the WhatsApp channel name and the email that is linked to your account so that we can check this for you.

Note: The earliest your tier can be updated is after 2 days. This cannot be done manually.

More details about the tiers and quality ratings can be found here.