If your post really reflects how feel, IMO you should cancel.
Consider rebooking some time in the future. (Especially if you have a non refundable deposit) IMO you have already made two mistakes and you may be leaning towards making another. Obviously your SS booking was not too expensive when you original book it and the Retreat experience is the best Celebrity has to offer. Then you booked the CC that most of us feel offers little value for the extra cost. Compared to the Haven, you may be setting yourself up for a major disappointment.