Teenieleek, I forgot to reply before now - sorry!
I can sympathise with being stuck on the last few of a crossword or puzzle. I know three months is a long time to wait to see the answers, but that's the format of the Rainbow Quizzes.
I just find it baffling (and rather sad) that some people won't send in their entries - and, more importantly, their donations - until they've had help. The charity organisers, for whatever reason, don't ask for the money/cost to enter first. Some people justify asking for clues, hints, more hints by saying that they are Helping The Charity, Raising More Money For A Good Cause. This is only true if they are people who wouldn't send in a donation unless they have all the answers.