Discovery Life will harass you if you turn them down!

A man that said he's calling from Discovery (Their outbound sales call centre) is HARRASSING my wife. She has already blocked 3 of the numbers he's phoned from. He has phoned in the 10s of times now!!! At least 12 times on Friday alone! AFTER she told him to leave her alone! When I searched his number on TrueCaller it came back as "Momentum Life Cover". So he was lying as well. I'm pretty sure we could take this to SAPS now it's gotten so bad! He has gotten personal! He thinks it's a big joke, like he's untouchable. HOW CAN DISCOVERY employ people like this? HOW ARE THEY ALLOWED TO WORK THIS WAY? This is beyond disgraceful! He phoned to sell something, my wife said no. SO MOVE ON!!!