When the mistake in question is a sum of money orders of magnitude bigger than what you make in a year, demanding it back in 7 months sounds like the only reaso

When the mistake in question is a sum of money orders of magnitude bigger than what you make in a year, demanding it back in 7 months sounds like the only reasonable thing to do. Especially if it's very clear that you knew it was a mistake, made no honest effort to notify them, and proceeded to spend all of it as fast as you could.