If the merchant provides evidence that it was a legitimate charge, then I believe Amex would reverse it. This is why I'm taking this to corporate. Somebody in the W Buckhead's finance department needs to get their act together. I hope they realize they're pushing a long-time (26 years), loyal (1,963 room nights) customer ($19K+ last year just on Marriott) to the tipping point over a $127 charge. I'm also on a pace to exceed last year's spend for 2019.
BTW, I've even thought about visiting the hotel office since I live in Atlanta. Let them tell me to my face that this is a legit charge.