Hippo sells your number to other companies

I went on their site, to get an idea on prices. I typed in my information, and asked get quote. They gave me a list of all the available insurances, but I never clicked on any of them, I left it there.

Later that day I got a call from 7 different insurance companies. I never gave them permission to give my number to anyone. And still until today. I get calls from, Budget Insurance , Hippo, Sure, Unlimited Insurance, Letsatsi Funeral, Funeral Cover... the list goes on.

I want to know, who gave them permission to sell my number to these people, and how they are going to let all these people know to take my number off their system.

Thanks