The FTC changed several years back.   You do not have to re-register on the DNC List.   Once signed up,  always signed up as long as you keep your phone number or choose to opt out of the service.

No message left calling 3-4 timed a day no response of I do answer annoying as ****

LC is correct, and to you "FYI" means "For Your Ignorance". Where on earth did you get a seven year expiration? Initially the expiration was set for *five* years, which thanks to the presence of many outdated web pages a lot of people mistake for current law. I don't think any registration ever did expire, as the popular law was revised just before the first five years was nearly over.  

Do Not Call Registrations Permanent and Fees Telemarketers Pay to Access Registry Set
http://www.ftc.gov/opa/2008/04/dncfyi.shtm

''Telephone numbers placed on the National Do Not Call Registry will remain on it permanently due to the Do-Not-Call Improvement Act of 2007, which became law in February 2008. More than 157 million phone numbers are on the National Do Not Call Registry.''

Just in case you aren't following FTC press releases, the Commission has been keeping its Q&A pages alive the whole decade. See Item "Will My Registration Expire?"

Q&A: The National Do Not Call Registry
http://www.consumer.ftc.gov/articles/0108-national-do-not-call-registry

Tell me, do you automatically pay a fine or go to jail each time you exceed a highway speed limit? Hardly .... First you have to be seen breaking the law, then your car must be made to stop, then someone with authority must act to punish you. The federal Do Not Call registry is not like the traffic court or a police officer. It's like the speed limit sign. You'll break the law all 52 weeks if you don't respect what it says and you're sure you won't be caught or penalized for ignoring it.

Criminals with autodialers never liked what the Telemarketing Sales Rule says and don't care about your puny registration. It is so much simpler for them now to hide behind cheap VOIP accounts and Caller ID spoofing. None of them will ever stop calling until one of us sues them out of existence, and they know you can't win a judgment check from a place you can't find.

PLEASE STOP CALLING