I have a reservation for my wife's 50th birthday t...

I have a reservation for my wife's 50th birthday through a third party co. I called Marriott reservations to book reservations with a different date. I explained that I would cancel my third party booking in order to rebook. The reservation representative was very short with me and actually hung up on me while I was yet talking. If this conduct is representative of the hotel, I will have no other choice but to stay elsewhere.