You might want to call back again at the end of next week to check on the progress.
If you haven't already done so, ask for automatic confirmation- so they don't have to try to contact you if/when the dates become available.
Also- you should consider accepting ANY of the days as they become available- otherwise they will only reserve for you if the entire time opens up. The risk there is that you might have a hole in the reservation, but I think you will have success if you will do it that way. Fill in any "holes" with cash nights if possible.
Good luck!