Power cable for 2022 imac 24"

A house fire destroyed my office. My iMac 2022-24" 512 SSD could be repaired. However the cable that connects the computer to the outlet in the wall was destroyed. The Apple store people gave me the wrong AC cable. It has a 3 prong acceptor for connection. The imac has a circular single prong acceptor. Pictures attached. Lower picture is white incorrect. AC cable. The Apple people appear flummoxed about this cable. They say that I need a second part for connection and will order it. I am wondering if anyone has ever had to replace their power supply cable and if so, how did you get a new one?