Harrassment / Deceptive call center agents

Over the past 3 months, there have been up to 7 calls a day from Platinum life, using multiple phone numbers. Each time I block 1 number, 3 new new numbers appear. This is extremely time consuming and annoying. On multiple occasions, I have told the call centre agent to remove me from their contact list. They end the call and within an hour, another Platinum Life agent calls me from a different number. If they can't comply with a simple request, why the hell would I want to take a policy with them? Also, they lie about how they got my details, and use a random facebook contact of mine as their referral. I consider this a breach of POPI and will look at legal action if this continues.