this number has called several times a day for several days, no message has ever been left

from the commander business centre wanting to talk about our business telephone options.

i called back number (08) 6430 8454 was put on hold music but no one answered the call.

Assume it is some sort of SCAM or SPAM. Rings, but hangs up when you answer. Probably recording the time you are at home, so then 'a person' may call you later.