Got a call from this number 3 times within one hour.

i answered the phone and it was silent i kept saying hello but no answer and then they hung up.
I could hear them doing something in the background.

Its 'National Hearing Care' - just called them after they called and simply hung up, i have now added their number to my PBX's 'block list'

Receive numerous calls from this number and when I answer they just hang up. My number is suppose to be silent I'm not sure why I pay for it now.

(07) 3018 1190 - after money I think

Have received numerous calls from this number.  We answer and they hang up.

I just got a call from 30181190 and gave my name then the caller said they had the wrong number. I rang back no answer but seemed strange though this seems like a Brisbane city number?

I just got the same thing!  I answered with my business name and a female said "I'm sorry I've got the wrong number"
Seems like quite a coincidence that the staff at this number just keep ringing the wrong number!!

Just  got a call from this number and as soon as I said Hello they hung up, I have a private number so it goes to show you that you pay extra to have a unlisted number but these people still find it