Hung up when I answered

bad number！

Got a random call from this phone number, no left message

I didn't answer, but the fact that they called at 6pm at night and didn't leave a message makes me think telemarketer/spammer.

Rang my phone and didn't leave a message

Missed the call and tried calling back on a landline and my mobile and it said "This number is not available on your service" and to contact my provider number thats on my bills...? Mobile is through Vodafone and landline is through Telstra

when I called back it said the number is disconnected.

Didn’t pick and left a message with no information.

Hung up when I answered?

Ignored, left no message