Hello, I’m Nathan, and I’ll be assisting you today. My livelihood depends on your positive feedback, so your satisfaction is my highest priority.
Sorry to hear you’re having trouble.
Are you certain of that model number? Are there any other indications on it?
The reason I asked, Tom, is that the model number you provided is just a basic cordless telephone system.
It does not possess any internal answering function. So, you cannot change the message on the phone itself.
This is something you'd do through your phone company, to change the message on the voicemail service provided by them.
Try dialing your own home number from the home line, then press * to hear the personal options to change greeting.