I agree with you. I've tried to block each one of them for maybe months, but nothing's changed. I still get at least 2-3 calls each day from them. I think ignoring them is the best option for us now, or if you would, just answer their calls, ask their company name, and sue them because of their multiple calls. I just read about this at http://www.whycall.me/news/my-4500-payday-from-a-telemarkete....

So let's make a daemon app which calls that exact number on the 2nd SIM and if it's not busy drops both calls.