We had booked a private French speaking tour in advance but when we arrived they didn't have the reservation as they had written down a wrong date. They didn't apologise or say that it was their fault even though my friend showed them the email correspondence. They didn't offer any compensation but when my friend asked for it we got a more expensive tour for the price of a cheaper one. They said that there were no French speaking tours that day which I find strange as we were in France. We had to wait for 30 min for an English speaking group tour. The guide didn't speak clearly or have a very good English pronunciation which was a shame as we didn't understand everything. In the beginning of the tour they showed us a short video with images of champagne and champagne making process which I found unnecessary.