I called back number 0478 398 695 reached IVR for a company called Australian Credit and Finance.

Same as the others. I answer the call, it hangs up in 3 seconds. When you call back it does not work. Ive just blocked the number now after the third occurance.

Same experience as others, only on the third call I spoke with a lady who told me that they are a mortgage broking group. Would not tell me who the internal owner of the number was, or why they called me. Best guess is that I had been doing internet searches on mortgages and also property valuations, a valuation site for ANZ asked for a telephone number which I supplied, being ANZ. I have not provided my number to anyone else, so that is an assumption.

Constant daily calls. I rang back and was put on hold for a long time. I hung up.

Keep calling me. When I called back the phone was answered by an automated voice asking me to wait for the next operator. I hung up

Seems like a computer call - answer the phone and just a long wait. I therefore hung up assuming it to be random computer generated call waiting to get a sales person to start their pitch.

Rang 3 times and I answered it, then they hung up.
I refuse to call them back

Keep calling. When picked up the phone no answer than 3 sec. hang up the phone. when call back said is "Australia Credit and Finance Co"