As I read this, the bit about the swimming pool has nothing to do with your "real problem." I gather that the real problem has to do with an apparent $39 overdraft charge which you believe was caused due to a mistake by Hyatt. Furthermore, Hyatt did immediately reimburse you for this charge.

I am by no means an apologist for Hyatt, but I see nothing in their correspondence as you have published it that is even vaguely insulting. Both notes sound polite and responsive, as was the action taken. Based on the evidence you've presented, it seems inappropriate to draw the conclusion that you are being treated as a "second rate con."