Hello, tbredeweg! We appreciate you taking the time to reach out to us for assistance here on our forums.
I believe the following site is what you are looking for: https://comca.st/2JiiTyo We have many great support pages here to help you take full advantage of your services. This one will walk you through the steps of changing the voicemail pin. Please let me know if this helps or if you are still having trouble getting that pin changed.