>> Should be a Law Enforced against robo call  <<

Um ... there are several.

Here is the latest, Interesting news about what the government is doing about robocalls:
http://www.consumer.ftc.gov/features/feature-0025-robocalls

Getting calls from Rachel of Card Services?
Read this:
http://www.ftc.gov/news-events/press-releases ... wn-perpetrators