The best thing to do is not answer - period. Block the call if you can. But once you answer they know they have a good number. Asking them to put you on their do not call list is a joke. If they were legitimate and you are on the national DNC list they wouldn't call in the first place.
Caller ID said 'Not Found'.
Picked up & recording already started re a life alert type system.
I am on the Do Not Call registry, so should Not be receiving this sort of marketing call.