After the CTS agent hung up the phone on me, I immediately called CTS again to ask for a supervisor. I was connected to a supervisor on the follow-up call and explained the whole situation to the supervisor on duty. She explained that the only times a CTS agent can hang up calls on anyone is when the caller makes crude or vulgar remarks and the agent warns the caller first. Then, the agent can hang-up on the caller. In this case, I did not use any profanities or demeaning remarks against the CTS agent. The supervisor profusely apologized for the CTS agent's behavior and offered to rectify the situation by calling Marriot and inquire about my reservation on the promotion offered through My Life My Card program. I thanked the supervisor. The supervisor remarked that ALL CTS agents should be aware of any promotions that Amex is offering and the Centurion member is the last person that should inform the CTS agent of those ongoing promotions. She explained that Centurion card members are paying for a service and that we should not have to search for these promotions then informing the CTS agents. They should be the ones doing the legwork. I thanked her and she offered to email me her contact info and would follow-up on my reservation next day.