Total rubbish. Who feeds you these lies? There is no truth to what you said. I know, having managed a telemarketing call center for 6 years. (I don't do it now.)
Called me, left no VM, I called back immediately and it was a robot telling me to press "1" if I wanted to be removed from the call list within 48 business hours.
the number keeps changing but the message is the same. Either your warranty is/has expired or some other nonsense. I agree with prior writer who said if you respond in any way, they add you to the live number list and you will get more calls.