These pricks are persistent too. 3 or 4 calls a day until I blocked them. I don't care if they're legit, if you tell them once you're not interested then they should stop calling, plain and simple.
Typical insurance arseholes

I called back number (02) 8043 3648 spoke to a woman who said company name is Real Insurance.

Real Insurance. I think they're legit company but just sharing in case you want to answer the call or not.