Tried using my $50 'thank-you' GC at the Atlanta W last month. Initially it looked like $50 came off my stay total according to my credit card activity, but then the next day the $50 was added back making me think the GC didn't work and the hotel just charged me the $50. So I tried using it again at the Westin in Pittsburgh yesterday and they couldn't get it to work. Is it worth going through the Bonvoy customer service machine to figure out how to use this $50?