You will likely get away with this due to the specific circumstances, but be aware that it could be grounds for cancelling your Marriott account. The Ts&Cs address unsettled hotel bills under the "Cancelling or Suspending by the Company" section. I have zero interest in playing the schoolmarm role that some around here so relish, but it's one of those things I believe to be worth considering when there's a dispute such as this, so making a note of it here...