Meta has stopped this WhatsApp Business Account from sending until a billing problem is fixed.
Meta's own health check for this number says sending is blocked, and the reason Meta gives is about payment or billing. Nothing is sent from the number until it's fixed in Meta Business Suite.
On Billing in Avox, open How to fix to read what Meta says.
Click Fix in Meta and fix the payment problem in Billing & payments.
Back on Billing in Avox, click Check again.
If Meta still blocks sending after the payment is fixed, contact Meta support from Meta Business Suite.
Still stuck? Send AVX-3441 to hello@theavoxai.com along with what you were doing when it happened.