Increase Daily Message Limit
Step-1: Go to your Meta business page https://business.facebook.com/wa/manage/
Make sure you’re looking into the correct Apps (see sample below)
Step-2: Depends on the interface, you can now request to increase the sending limit based on the following guide:
a) Click on ‘Start business verification‘
and complete the process by submitting the require document accordingly.
or
b) Click on ‘Incease Limits‘
and complete the process by submitting the requre document accordingly.
Note: Usually it takes within 24-48 hours to approve the verification should you submit all necessary documents according to the requirement.