I have never heard of any good reasons for booking non-canc reservations 6 months in advance (and this included HI, PR and Mex resorts). Too many things can happen. Actually I dont think I have ever seen non-canc offered that far out.

Trying to dispute the charges on a cc is rediculous and not kosher in any way. I have successfully changed or cancelled non-canc dates in the past a few times, but I ate the other 75%. You must deal with the actual hotel reservation management. Oh yes, it helps to be elite or have previously stayed at the hotel. At best try for ff credit. Good luck.

MisterNice