Voicemail needs your name

Is there a way to avoid giving your name on the voicemail? It seems to be compulsory  

I frequently help my mother with tech problems and advice and I am trying to teach her about phishing etc. 

she gets a lot of spam calls, she now knows to send unrecognised numbers to VM but she gave her full name on the voicemail, I have overwritten this with another random word but periodically the mailbox seems to reset and she will go through the automated set up steps and give her full name again. 
I feel like Smarty should not be encouraging anyone to give personal information out like this but it seems that you can’t bypass this. 

do they have a forum to recommend improvements?

thanks