Call blocker might be of some help. Also don't pick up on numbers you do not recognize, or where there are caller IDs that seem odd. Or where there is no caller ID. There’s no way to stop the calls from being initiated.
This number calls me several times every day. It says 'DO NOT USE' in the caller ID. I think I answered it once months ago and it was a warranty for my car. I told them I sold it and they said they would update their records. But they just continue to call me. They are wasting their time, not mine. I will never pick up.