Colosseum tour to include the underground
 

I have attempted to order tickets online to the Colosseum directly. I have read that the underground portion needs to be purchased by telephone.
I have gone to the direct Colosseum website and it did not offer a date to choose and it is in italian. I need help! :(
Going to Rome April 4 thru the 12th.

YOu have to call the number on their website to book the underground tour.

http://www.coopculture.it/en/events.cfm?id=6

How about ordering the Colosseum tickets only?

Yes, you can purchase the Colosseum tickets on the coopculture website (it's the official site). It will be 12€ unless there is a special exhibition and then an exhibition fee is tacked on (3-4€ usually). There is also a small transaction fee (2€).

http://etickets.coopculture.it/index...9-1C2283FF1AF9

Thank you all for your suggestions.
I have ordered tickets to the Vatican online and am waiting on a reply via e mail. Does anyone know how long this usually takes?