I removed my account from everywhere it was linked to my app, but I had problems that Facebook couldn't solve, telling me to simply switch to another number. However, I must say that this phone number was costly in monetary terms. When I tried to remove it, the issues worsened, and now I can't access it anywhere, neither on mobile nor through the Facebook Business web interface.

I have tried countless tasks, like removing everything linked to that account, the number, and even the app. It's been over three months, and the number has not been removed. P.S.: I am still receiving webhooks for that number, but the signature isn't even validated (even though I no longer have any active webhooks). The number belongs to my company, and I can't change it easily.