I have a long term Air BnB (6 months). I decided to cancel a few days before starting. I got a cancellation notice with a charge considerably higher than what my confirmation said it would be. The confirmation notice said I could cancel up to the 12th of January and only have to pay one month rent and a service charge. But on my the cancellation email it said I would be charged the entire amount of the 6 month rental period. This is obviously wrong. How to I fix it?