hearing this incident really piss me off.
Salute to you. But i guess you should still charge them for the work and labour of 4+hours.
No film development = no effort?
I believe post processing the digital files would take as long and as much effort as developing film, if not more.
I think you should describe the process to the old uncle all the cheem techincal stuffs until he blur and ask him understand or not. Mock his ignorance. mountain tortoise.
Ya next time write everything down in Black and white to protect yourself and the other party.