The caller with the number +61439289450 is likely to be a scam operator, as they did not leave a voicemail and the number was disconnected when called back. This behavior is often associated with phishing attempts or telemarketing scams, where the caller tries to trick the recipient into revealing sensitive information or making a purchase. The fact that the number was disconnected after calling back suggests that the caller may be using a temporary or fake number to avoid detection.
I didnt pick up the phone, and no voicemail was recieved, when i called back the number wasnt available, i think this number is not safe to answer