How to alienate your customers, a step by step guide by Affinity Health

I was an affinity customer a while back, was quite happy with their service actually. I decided to move purely based on the fact that I wanted medical aid, not medical insurance which is what they provide. Now, several years since that, I am being HARASSED by their call centre. Literally every day I get a phone call from them trying to sell me medical cover again, all you're doing is ensuring that I will never support you again. Dunno where these companies get off thinking they can harass their ex-customers like this. I block a number, and the following day they start harassing you with a new number. Seriously. Stop. I don't want your service and following your harassment, you have ensured I will never consider you, or recommend your service again.