Anyone knows how to stop blocked numbers from leaving voice messages

[son0707]

01992308578 burlar alarm is all what I'm getting. It's be going on for a year or so randomly. 

[nowdeleted]

I assume you have done a Google search of the number??
Have you enabled the caller I'd and spam protection in your call settings

[Robin999]

Can't do it on Android. However, there are 3rd party apps available from Play Store that claim to do this. Can't vouch for any of them as never used.

[son0707]

Yes did all that but they just keep leaving that dreadful message burglar alarm over and over. 9 times in 2 days