The Sheraton in Mendoza crossed the IVA from my bill on check-out without having to prompt them. This was a week ago.
The Yrigoyen 111 Hotel in Cordoba refused to refund about 10 days ago. Not sure why, but the reservation (not a deposit or a payment) was made through Orbitz on Dec 30.
I should have stayed at the Sheraton while in Cordoba.