Nonstop calls

I had like 10 plus calls from Outsurance in two days. I asked the gentleman to please remove me from their cold calling list and he said to me that I need to tell him why I am uninterested. My answer was im just not interested, please remove me. That was 3 weeks ago. The phone hasnt stopped ringing. This morning I have lost it over the phone. The more I said im not interested the more the salespeople demands an explanation why. Please, for the love of God, STOP ****** CALLING. My phone is for my convenience, not irritating salespeople's convenience. No means no.