They called us 15 minutes prior to departure telling us the tour was cancelled. Finally as we had a baby they changed opinion and added us to a mixed Italian and English group when we paid for only English. Additionally the tour we went to was 1.30h instead of 2.15h that we paid. The group they put us in didn’t seem to be of the same organization and even more people was added by random guides giving 50€ bills to our guide. Sincerely the organization deserves a 0/10. I recommend 100% visiting Sassi de Matera with a guide, but not with this organization. As a final note our guide was actually great.