I've been in China a few days and no one seems to be honoring my DCC opt-out preferences. I'm taking pictures of all my signed receipts showing RMB selected.

One was at a Crowne Plaza, where I'm staying. I charged a RMB 188 dinner to my Chase Sapphire Reserve and it posted (it has already posted) with exactly the offered DCC-ed amount of USD 28.77 instead of the correct amount of $27.61. I'll still be there for a few days. Should I try to confront them about it, and if so, how should I go about that?

I know I can contact Chase, but I feel as if I'm going to come back with around 10 receipts that all have to be re-charged.

And speaking of Chase, is there any way to see on the Chase site the conversion details? Most other banks' sites seem to show a charge of, say, $27.61, but then show in the details that it corresponds to RMB 188.

Thanks,
Seth