Flight Centre Australia

A group of us have booked a cruise package through Flight centre Kangaroo Flat. I have discussed and organised an extended stay at the end of the package as did some others in the group. However when the final paperwork came through the had mixed up the dates of my return. I immediately emailed my consultant and called the store so I could get it resolved before the payment request expired. I was told that my consultant was unavailable and there was nothing they could do about changing the dates. They would contact the consultant and get to to fix problem. I did not get a response for days. The consultant apologised for the mix up and sent a new payment request. When I went to pay the request I noted that it was $200 extra. I complained about this but was told that it was the current price for that date. When I said that it was unfair to expect me to pay extra for their mistake I did not receive a response. I called the store again same response - they couldn't do anything but contact the consultant and they were unconcerned about me being charged even more if the price went up again. The payment deadline is looming and I do not know what I am supposed to do. Quote number: 213****