I am sorry to hear the price has fallen but prices seem to change on an almost daily basis due to supply and demand. Rather like seeing the suit you bought at M & S in a sale the following week, there is nothing you can do, the contract was agreed at a fixed price and presumably you thought it was a good price at the time. It makes me wonder how the travel industry can expect people to book well in advance when prices fall, it would be interesting to see what would happen to prices if we all left it to 2 weeks before travel to book? I suspect most of the operators would have gone bust but the rest would presumbaly try and put prices up again even then!