Classify the given hotel review based on the sentiment it expresses into two classes: negative and positive.

Often visit Chicago, but this was my first stay at this location. Was able to secure a good rate through travelzoo. Thought the room was clean and was nicely decorated. Was very disappointed in the service. Stayed on a Saturday night - waited 20 minutes for extra pillows - called for 15 minutes but found out the third shift crew came in 20 minutes late. Also received an incorrect folio under my door(another guests that was staying at this location). I called the front dest to inform them of the error - and they explained that this was made in error and would be corrected. I opened my credit card statement and found that I was charged for three different rooms - one on the date of my visit and two a week later. I called the hotel and guest services took the information and forwarded to their accounting department. Received a message to call the billing department, have called three times - but have not received another reply back.
negative