I registered my (Virgin Media) phone line with the TPS as soon as I knew the number, and I've never had an automated call with any human being involved. The only ones I get -- which are pretty rare -- are pure robocalls, almost always "Congratulations! You have won a Caribbean cruise". The voice recording invariably has an American accent, complete with cuh-RIB-ee-un rather than ca-ri-BEE-un.

Peter