I know that you are mad, but I suggest you to read all the things that are written under the tour at Tripadvisor. So, under this tour is written clear” tour is operated by bus, in case of small number of people it operates by mini van”.It depends on bookings for that day. So, I do not know why you are giving me wrong informations? Private tour is not 70€, you should check private tour and prices for that tour. I really do not know which bus can take 60 people, really? That is unbelieveable. I am sorry that you do not get your money back, but you booked and you got a tour that you booked.
Thank you and have a nice day!