"Why does the government not do anything about this?"  Do something about what?  No one here has posted who or what this organization is or what they want.  Some people have indicated that it is a survey, which is not illegal under the law.  As to the government, in case you have had your head buried in the sane the last few days, they are busy with a terrorist attack in California and also terrorists sneaking across the border.  But hey, they should drop that and get right on your telephone problem shouldn't they?  Or you could take things in your own hands and google "call blockers"