Based on the available information, it appears that the caller with the number +27101407558 is likely making unwanted calls, and the recipient is not aware of the caller's identity or purpose. The fact that calling back the number results in a message stating that the number is incorrect suggests that the caller may be using a spoofed or fake number. This behavior is often associated with telemarketing scams or phishing attempts, where the caller tries to trick the recipient into revealing sensitive information or making a payment.
An unsolicited call; when I tried returning it, the automated reply indicated the number was invalid.
