Content Deleted Revert to an Older Version?

Hi,

My team and I were using the collaborative features to edit our Prezi. We have been working on it for weeks....When we logged in today, it appears that someone on the team accidentally deleted ALL of our content/frames/images text ect. Is it possible for you to revert the prezi to the last time it was saved on Wednesday March 26th around from CST?

http://prezi.com/skdwazscp9bv/edit/

Thanks so much!!