Enough is enough harassing people

Good day we have received like hundreds and hundreds of calls from platinum life by some person by the name of eathen bester or something he literally has been harassing my mom he phones her daily like 10 to 20 times and constantly insists to join platinum life and we are not interested qwe have stated each time but he keeps phoning and keeps asking my mom each time to join we block the number but they probably have a number generator so it each time we get phoned with a new number do better this is harassing clients