Digital Phone Answering Machine How To Retrieve A Deleted Message From A Digital Answering Machine?

How to retrieve a deleted message from a digital answering machine? - digital phone answering machine

I have a DECT 6.0 phone and digital answering machine. An important message that was left was inadvertently deleted. I looked in the manual on ways to retrieve a deleted message, but found nothing on this subject. I also tried calling the customer service, but not until Monday! Is there anything I can do to this message again, or is deleted forever?