If it's your cellphone in USA, you pay for it. Hang up. Only american cell service  "doubledips" and charges both ends. afaik. I give out an old number connected by landline to an answering service to the public who ask for it.

Worst still,,, I've been clearing my grandmother's answering service for the last ten years (she has alzeimer's). The scumbags who try to talk old people out of their money would astonish you. And the scare tactic politics to get votes... It's just not a big enough crime yet.