I regret to learn you didn´t join our Sagrada Familia guided tour because of arriving to the meeting 35 minutes after the meeting time.
Bear in mind the tour description indicates:
"Please, be at the meeting point 15 minutes before departure time"
Please note the voucher indicates the exact location of the meeting point.
Once the group is inside the Basilica, it is not possible to join the tour, since the tickets are only valid to enter with the group.