I’ve wasted money on a course
T hat is very unfortunate and I can see it’s both disappointing and frustrating. I presume you’ve talked to them about it, which is how you know you can’t be refunded. If the course is still going and they feel they are doing a reasonable job, they might well maintain it was your choice to leave and therefore they weren’t responsible. If, however, parts of it were cancelled, they’d need to look at a refund.
The challenge here is to focus on what you can learn from the situation. As a manager in your present job or in any new position, you’ll be faced at times with things that don’t go to plan. Observe the organisation you’re training with and see where you think they’ve gone wrong; then make a note of how you’d do something differently if you were running the course. This will stand you in good stead if faced with an unexpected change.
On top of that, observe your fellow participants and think about what different personalities might need.
You can also use this knowledge when you’re managing staff. I know it’s not ideal but, if you gather your thoughts and observations, I think you’ll be surprised by how much you’ve learnt, albeit it in a slightly unorthodox way.