Voicemail still plays old voicemail from previous
I've recently got a work phone (iPhone 7), and the voicemail won't update. I've changed to multiple times, and when I click on greeting it's saved as my voicemail. But when people call it still plays the previous person's voicemail (phone has stayed within company, just passed onto me). How do I update the voicemail to mine? Thanks!
iPhone 7, iOS 13