This number shows up as being in Canberra, no one answered the call, but the message came back with this mobile number is not connected.
It called again today, Mon 24th February 2020, no one answered the call, but the return call got this message, ... in an American style accent, ... cannot be completed, and dialled please consult your directory and call again, or ask operator for assistant, this is a recording. The same call continues. Then in an Australian accent, the number you have dialled or is incomplete, please check your number before calling again, the 3 ma 06 ... tones & call hangs up.

I have several messages left on my message bank and they are in Cantonese/Chinese or similar.