All flights are subject to book date.The price is without advance notice if rejigger, all the promotion is non-endorsable and non-refundable once settle the payment.
And why hadn't anyone advised us that the travel agency can't refund your money unless the tour operator can get the passengers' fees back from the reserved hotels, the tour boat's company and so on?
In fact, returns have become such a headache for retailers that in some cases they're just refunding customers and letting them keep or donate the unwanted items.