WhatsApp Banned My Account For No Reason

I set up a group on WhatsApp a few months back, and it was going great until today. I wanted to add several people to the group simultaneously, so I began adding them individually. Out of nowhere, I got a notification saying, "This account cannot use WhatsApp," and it urged me to sign up with a different number. I haven't broken any rules or acted inappropriately, so this situation seems unfair. Not being able to access my account has really disrupted my routine, particularly because I rely on it for communication on a daily basis. Please reactivate my account at your earliest convenience. I depend on WhatsApp, and I trust that this issue will be resolved swiftly without any more interruptions.