By law - all phone companies must pass along every call. That's why, if they offer call blocking, you must block the number, not them. Want the law changed? We'll leave it with you.
"This is your final chance to lower your credit card interest rate". when a real person answered and I asked which card they said visa or master. I asked several times. Then I asked what bank. They rattled off several (I have a CU). when I asked for their company name and to remove me from the list he promptly hung up.
This is an ideal solution. The scammers need to be inconvenienced as well. I think I will mess up some numbers, blunder my "mistake" and make additional errors. They want credit information but we must give ourselves credit for taking up THEIR time.