Originally Posted by
AJNEDC
You tried to work it out with the hotel, but your attempt proved futile. Time is too precious to waste it with the hotel when that's what your credit card company can do on your behalf. Make sure you have all your documentation in order showing the refund policy and when you cancelled and give your credit card company a call.
Good luck.
I've had to do a few chargebacks for similar reasons at another hotel. I just use the online form.
I make at least one attempt initially for the hotel to resolve via the billing issue form on the Marriott website, but if no response or unresolved within a week or two, then I figure I've spent more than enough of my time on it.