I booked the andaz deal too. 3 Days in August. They called me too, with the same message. I choosed to rebook to another proberty in London. 5* Grange St.Pauls . Instead 269$ for 3 nights the cost are now 600$. But the difference was paid by Hotwire and the best is , that the new reservation is refundable. So i am satisfied with this solution.