Stayed at this hotel for a medical event 1/11/2018...

Stayed at this hotel for a medical event 1/11/2018-1/14/2018. From the booking, to check in, to check out, and hours of post-checkout discussions, the hotel experience has been a fiasco. Wrong charges, duplicate charges, multiple incorrect invoices, 1-hour-plus on the phone so far including transfer upon transfer, and unprofessional front desk attendant, etc. For $322/night, you would expect much better. I will avoid Marriott going forward and recommend events be held elsewhere.