I called back number 0420 975 378 spoke to a woman who said I've reached Choosi Insurance.

i don't know this number and they keep calling

Rec'd three calls within an hour between 9-10am, however, we leave the answering machine on permanently, and just call back those we know...and tag those we don't as nuisance calls. Based on their persistence, we called it back (as someone was clearly keen to contact us). They said they were Choosi Insurance, and our number (and a name, but not ours) had been left on their website wanting a call back for a quote. Sounds likely, however...if it was legit, why didn't their number come up in Reverse Number Lookup, or on Google...or why didn't they leave a message on any one of the three occasions they called?