Yeah, I wouldnt take them to the disputes tribunal. Bit too far, especially because they were just trying to help. I get my neighbor or my mate who has a turtle to come around and feed every second day and put the amount I want them to feed on a piece of paper. I went away for two weeks over Xmas and all there was, was algae on the glass. No green water, no food accumulation.
It may be worth it to invest in a automatic feeder if you travel quite often.