I am receiving conflicting information about ticket protection on AA to Oneworld on separate ticket. I was booked 26 May AA945 DFW-SCL Arriving 27 May, 001 ticket. Connect on LAN932 SCL-MDZ on 045 ticket stock. DFW-SCL segment is delayed 12hrs causing misconnect to SCL. Multiple agents (Exec Plat desk and DFW agents) have said that they cannot protect me on a flight SCL-MDZ. Is the information I am receiving correct? How would I explain to an agent that AA has to honor my connection to MDZ?