Unfortunately you've found out first hand why you must never, ever pay upfront unless it's by credit card and even then you must be wary.
The CAA has no mandate to look into a schools funding or financial dealings.
Seriously though, let some of us on here know who and we may be able to help out.
If you don't want to post who on a thread, then send a PM.
You may have to accept some penalty, but this should be offset by the schools inability to provide you with what you have paid for.
Robin, you may be surprised to know that schools books often look better during winter months, as the revenue from trial lessons comes in , especially in the run up to Christmas. The summer is often spent flying these and has a cost, but the money is long gone to pay for it!
The sooner the sharks and incompetents are run out of GA, the better for us all.