My old mobile number which is now used by my partner keeps getting calls from this number (03) 8878 0600) as well as (03) 8586 8300. Most are during working hours but some are as late as 8:00 PM and even on weekends. Does anyone know who these numbers belong to and how they get access to our numbers?

I've received this call a couple of times this week. I don't answer numbers I don't know.  I just received it again (Sat 10.25am) on my home phone and my mobile.  Not sure who it is but I'm guessing a charity

It's from the North Shore Heart Research Foundation - http://www.heartresearch.com.au/.