You are dealing with criminals here. Telemarketing to a cellular phone is illegal. I cannot overemphasize this enough. NEVER EVER cll the removal number, not only are you verifying to these crooks that their call got through, they will now sell your number to other scammers and the call will never stop. The only thing you can do is to block the number from calling your phone. You can do this usually online or call your provider's tech support and have it blocked.