thank you for your review. We are sorry this happened to you. Unfortunately, sometimes there are unexpected situations occuring, such as today during the afternoon tour (14th September). As you write, you have booked a spot for a free walking tour. These tours are entirely free and we do not pressure anyone to pay anything during these tours. In order to realise this, we have to schedule our resources carefully, so that we often cannot have backup-guides available to take over in cases of emergency, such as today. Our guide had a last-minute emergency and couldn't deliver the tour, which resulted in a lack of communication to you waiting at the tour spot.
We are very sorry this happened, as you obviously expected something else. Nevertheless, you are more than welcome to join us at any other occasion for one of our free tours (which we try to run 2 times a day).
Again, apologies for this happening. It's not our intention to create unhappy memories for you and do hope you have enjoyed the city nevertheless!