"Rescheduled surgery"

I requested a month notice for my surgery as I need to organise time off work, etc, etc. My surgery was confirmed for late May and I made appropriate plans, booked flights, booked accommodation, etc, etc. Then 2 weeks before my scheduled surgery I was called and advised that my surgery had been rescheduled for September. This is quite frustrating as I've had to go through the process of changing my flights, leave from work, accommodation etc. The waitlist officer I spoke too just stated it was out of her control (which it was) and agreed to rebook me. I was pretty frustrated by the whole process, and even more so by what I'm dealing with now trying to reschedule everything.