This number called me but stopped before I answered. I immediately called the number "this number is not connected"

I called back number (02) 8027 2000 just kept on ringing no one answered the call and never got any voice mail.

Just received a call and subsequent message from this number that advised (as per others' feedback) that there was suspicious activity on my credit card. The voicemail message left a different number to call back on which always seems a bit dodgy on the surface. I ignored all numbers provided and instead called the customer service number on my card provider's website. As it turns out, the call was legitimate and someone had in fat accessed my card which has now had to be cancelled. I suspect this number is perhaps a "dial out" line only and as far as I can tell, not a scam.

(02) 8027 2000 - called and routed to a busy tone after four rings.