Yep I am getting the same thing. Ringing a lot and hanging up from (07) 5906 9152

I've had 3 missed calls from this number, no messages. i tried to call from a separate landline, no answer, same 'Messagebox is full' RVA.

I'm glad I missed the call.

got a call no message tried ringing back message bank full

got a missed call could ring back as mail box was full WTF im going to report this to the cops .... glade i have googled the number

received a call from (07) 5608 9152. I answered but they simply made heavy breathing sounds.

I'm glad I googled the number to find out that I'm not the only one receiving these disturbing calls.
My friend has three missed calls. A few years ago I picked up, and all I heard was deap breathing/moaning. Dodgy!