I coordinated with GBNTC for six months to prepare...

I coordinated with GBNTC for six months to prepare for a filmmaking workshop. It turned out on the day of travel they had not actually paid for my flight, and the workshop was thus cancelled and never rescheduled. Still waiting for a reimbursement of my visa fees. Not to mention that I had already blocked time away from my employment in another country in order to deliver their workshop. Unprofessional and last-minute.