How can you recover phone voicemail deleted on S5

[AC Question]

Two days ago I was checking my voicemail on my Samsung s5. My carrier is TMOBILE. There were 10 of my most important voicemails AUTOMATICALLY deleted which had been saved. These same voicemails have been saved previously. Messages from my sister who pasted in June 2016 was one of them. It was her last message I have..please. This has never happened on my S5 before. Can the deleted voicemails be retrieved from a trash folder?
Help please

 

[anon(632115)]

Voicemails are generally on your carrier's server, not the device itself. Contact TM, although, if deleted, I'm afraid there is little chance of recovery. They would have been automatically deleted as they are only kept for a certain length of time