account email address unknown when signing in

I have tried logging in to my account that I have been using for around 2 years. (0909280:cumbria.ac.uk). However when I try to log in now, its not recognised by prezi. I also dont have access to that email account. Is there anything that can be done? I dont want to lose all the files that i made.
New email add is amdadali@hotmail.com