Graham,
Your posting has very little credibility, and it looks to me like you just want to make trouble, when there may well be little if any case to answer by Topher.
Firstly, your daughter is 18. She is an adult, and perfectly able (even if ill), to handle this issue in her name. The fact she had not suggests to me that she is not as 'offended' as you are, and I wonder what your own hidden agenda is. Maybe she understands deep down that she has been treated properly.
Secondly, your original report is laced (presumably deliberately) with emotional factors (young person, ill etc.). These are all irrelevant when determining what the correct outcome is.
Thirdly, frankly, it holds very little credibility for someone to cancel a course 2 months in advance on the grounds of illness. Even for a moderate to serious illness, that's plenty of time to recover. And even if not fully recovered by the time of the course, what better place to be when ill than on the warm Florida coast, on a MasterPrac course which can change your life and help you deal with the illness. Quite apart also from the likelihood of meeting relevant and helpful people on the course.
So from my perspective it looks like you're twisting the illness into emotional grounds for cancellation and/or better refund, when there probably isn't a case. Which makes me suspicious about the accuracy of the rest of your story (e.g. on dates & responses), and on your interpretation of the contract.
Also, having been a very satisfied customer of Topher on 8 courses & events and having spent far more with Topher than the amounts you're querying, I can personally attest to how fair and understanding Topher is when dealing with issues like this. If he has chosen to apply the conditions of the contract, then neither you nor your daughter has a leg to stand on.
Leaving aside the emotional factors and how your complaint looks to a 3rd party, your case boils down to a different interpretation of what the 25% refers to. Frankly that does not seem to be a legitimate reason to file a report claiming a rip-off, when it's just a contract dispute. And presumably you can or should be open to the possibility that you are wrong in your interpretation.
Based on what the other poster (Mark?) has said about the extremely generous and positive treatment your daughter has received at the hands of this alleged infamous villain Topher, although the past is the past, most people would suggest that your complaint is (a) very ungracious and un-appreciative of the EXCELLENT treatment your daughter has received, (b) at best flakey and debatable, and certainly not deserving of any suggestion of rip-off.
Particularly the last sentence of your complaint (they won't honour the cancellation clause) is inappropriate because that's exactly what they have done! Doh! The fact they have done it in a way which is different to how you understood it doesn't mean you are right, and it doesn't mean it is a rip-off.
Your use of language like "conned" is without substance, possibly even knowingly. And on that basis, yes, it would like you are the one in the wrong, very possibly knowingly committing defamation.
Perhaps you should let it go. For the sake of $1084, maybe this is the best investment your daughter (or you) can have made in a lesson about how YOU choose to handle dispute in your life. Perhaps this will serve you well for the rest of your lives. Question : are you or your daughter being 'at cause' in all of this? Or do you just want to rant at someone, regardless of the appropriateness and substance of the complaint?
I would suggest you withdraw this, and apologise to Topher, thanking him for all the help he has given your daughter previously.