Have not arrived and regret my decision to book he...

Have not arrived and regret my decision to book here already. I booked an advanced purchase two bed beach view room direct from their website. Unfortunately when I initially booked their stock of rooms was low and the room I wanted was not available. Later I checked the website and the king beach room was available. Lovely. Called today to upgrade my room to a junior king suite. I was told my reservation was noncancelable, non-transferable, and not changeable after a previous reservation agent told me I could at least upgrade. What resort does not allow a room change when they are going to charge you more to give you what you want? Reservations put in a request for my room change yet could not promise anything since there are very strict rules about reservations. This is my my first vacation with my boyfriend. I just wanted us to have a nice room on the beach, with great service, delicious food, and a spa.