I called back number (03) 8644 8193 put on hold music directly but no one answered the call it just kept saying to stay on the line.

This same number rang my mums mobile number and called themselves purple telecom. Had all my mums details from her phone bill and then asked for her Medicare card number then they got mad when she refused to give them it

calling me 4 times a day..not leaving a voice mail.

I called back number (03) 8644 8193 was put on hold music directly but no one answered the call.