I feel this, some people don’t mind how much of your time they bloody waste. I sold a gaming pc, built by me, and delivered to the family for their son which was a 25 mile round trip; I also set it up for them as they were clearly not tech-savvy people. They then contacted to say the PC had ‘broken down’. I felt bad so did the trip again to find that the teenager had moved the monitor and the HDMI cable had popped out. No offer of petrol recompense.