Recall the activity preceding the ban and compare it to the Acceptable Use of Service to build your case:

1. What kind of messages have you tried to send?
2. Whom did you message?
3. How many messages have you sent?
4. Have you tried adding contacts to a group?

If everything generally aligns with WhatsApp’s Acceptable Use of Service there should not be a problem with getting your account un-banned.Request WhatsApp to unblock your account

• Open the WhatsApp application on your phone.

If you see the “Your phone number is banned from using WhatsApp. Contact support for help.” message, tap on “Contact support.” In the contact form, describe your case clearly and politely.                                       

• Don’t mention using any 3rd party services or mass messaging practices.
• Do mention that you believe the ban is a mistake. Include any details that support your case. For example, providing evidence of user consent to receive messages from you.

WhatsApp unban request message template    

Send the email and wait for a response. This may take a few days, so be patient. Sample request:”Dear WhatsApp Support. I have reviewed your Terms of Service (“Acceptable Use of Our Services” section in particular), and believe my number was banned by mistake. I have messaged a number of contacts recently. But they have all agreed to be contacted by me over WhatsApp earlier by leaving their numbers on an offline event we all attended [Event link or name here] . I kindly ask you to review the ban and re-activate my account”