I have told them not to call me about ten times over the past two years. They still call me once a week, and sometimes three or four times in one day.
The have "sister" companies that perpetuate the same fraudulent practices as 29prime. In other words, they keep scamming, but under different names.
The only solution is to stay on the phone and waste their time (while you catch up on you web surfing). When they feel comfortable with you, ask them about 29prime.