I called back number (08) 8464 9950 reached IVR for a company called Compare The Market.

Relentless phone calls from Compare the market. I went online to compare my private health insurance. Couldn't do that unless you fill in a telephone number. Have had 5 calls today, all of which I didn't answer. I only answer numbers I recognise these days. If they need to talk to me they can leave a message. This is my philosophy these days.
I figured out what I needed to know on line so why do they need to harass me. If I wanted more information I would have called.
PS I put my mobile on No Caller ID to see who it was! They are now on my barred list.