I've been given this number through a dating site. Feeling like it's yet another scam.

These call Center call your number to see if it's valid or not hence hang up if u answer or don't leave msg or invalid call back details (ie number disconnected). If your number is confirmed valid it's then onsold as confirmed, and u can bet u will start to get telemarketing calls from then on. Block this number

a Jihad on these pricks who keep ringing and hanging up.

They called me and hung up before I had a chance to answer

i called back and was put on hold called not answered

I called back number (02) 9052 0865 was put on hold music but no one answered the call.