Generation UK interview questions

Uploaded my CV and answered 2 questions in relation to how my skills met the role description. I then completed a video interview which was pre-recorded at their end. Answered 4 questions in relation to how my experience fitted the role. Generation UK then advised I had made it through to the final stage - a live interview. This was re-scheduled at their end THREE times. I was also emailed a pre-interview task to complete. Part of the task did not make sense in terms of timings (I had to watch a video) they apologised for this and said they would email me the correct timings. They failed to do this before my interview was due so I cancelled. I messaged the person who was due to interview me to explain why I cancelled the interview. They didn't even have the courtesy to reply. I felt like they completely wasted my time. Thoroughly unprofessional. AVOID!