Lissabon: Geführter Rundgang durch das Bairro Alto

I signed up the Bairro Alto Tour. I showed up on time at the designated meeting place. The guides decided to cancel the tour and I was given the option to take the Alfama Tour instead. I did take it but I have already done the Alfama Tour twice in the past week. I was leaving Lisbon the next day so rescheduling was not an option. I would appreciate being notified in advance.