Voicemail not working after upgrading to new iPhone 11
I use to have an iPhone 6 and my voicemails appeared under the Voicemail tab as voice messages that I could listen to. Since upgrading to a new iPhone 11 my voicemails are no longer coming through as a voice message and I'm no longer notified in the Voicemail Tab that a message was left. This would allow me to activate Voicemails to old way. I cannot find any solutions as to how to get my voicemails back the way there were.
Thanks for the assistance
Craig.
iPhone 11, iOS 14