I sent them an email 3 months prior to the date we were hoping to skydive.
They confirmed our date and time. I would check in with them at least once a month for the next months to make sure our dates were confirmed as they did not ask for a deposit. Then again 1 week before the day, and finally the DAY BEFORE he confirmed the appointment.
We drove 3.5 hrs (essentially using up a full day of our vacation) to go skydive and when we got there, the office was closed. I then called him to ask him where he was, and he simply responded with "today is not possible, it is Monday" after 3 month of communicated that specific day and time! He never apologized or offer any sort of solution.
We wasted an entire day of our short vacation because of THIENE Skydive!
And no, it wasn't cancelled due to bad weather, it was beautiful outside. It was simply a lack of professionalism and just a bad business!