i've been constantly telling them that i just switched and we're locked into a contract and satisfied with how it is (click)... i believe it's working cause it's been a awhile since we have had a call.
When i was a telemarketer a long time ago, a good cheat to be deleted from feeds is to say " sorry, my husband/wife/spouse works for the same company your calling from and we already have it, thanks" (click)
when they ask for the business owner, i tell them i haven't seen him for months and if you find him, he owes me a lot of money... (click)
donotcall.gov i don't even bother with anymore