Telephonic Harassment to Take Out Policy

I considered taking out Gap cover on my medical aid for a short period. I went on the Hippo website to see what they offered - unfortunately I had to give my contact details before I could see the options. They didn't have what I needed and I cancelled the query - ie I did not click on a Please Phone Me or anything like that. I received a phone call about 5 minutes after closing the website and spoke to the consultant. He didn't understand my query and kept on trying to convince me to take out the cover they offered. I told him I needed to think about it and to phone me back. They phoned the next day and I told them I'm not interested anymore, and since then I have received *14* additional phone calls from them. I and my husband have answered about 4 of the calls and told them we aren't interested and to stop phoning, but they still continue.