2 missed calls from this number. No message left.

Answered this call, female voice with Asian accent said " Hi this is Amy from Mclean Insurance, how are you"?? - As if she cares how I am, & who the hell is Mclean Insurance??? Definitely no-one I deal with. I just hung up because lately I get so many calls from unknown numbers, & i'm sick & tired of it. I block the number, & then they just call back from a different but similar number. 5 hours after this call I received another from 0485 990 426 - same first 4 digits, so I think it's probably the same mob again. Just didn't bother answering that one.