I solved this problem, I bought a Panasonic phone with call block, it's wonderful, they call and it blocks their call. They no longer bother me. I block all unknown callers just by pressing a button.
We can send a man to the moon, jam radars, block phone calls around prisons but cant stop these annoying foreigners from calling and hacking the do not call database to get numbers or websites... It could be stopped if they wanted to..