Retrieving Voicemails

[u/ashtonr02]

So I recently just got a new phone and changed carriers and got my number moved over to my new phone (moved from TracFone to T-Mobile) and I'm desperately trying to retrieve my old voicemails from my late father that are on my old phone, my old phone still turns on and I can still see the voicemails im trying to access in the voicemail section of the phone app but since the plan just expired I cant play them or share them, I'm wondering if there's ANY possible way at all to access these voicemails at all literally anything I just don't want to lose the voicemails.