cannot restore site through snapshot

I am having trouble getting upfront to load for me now that i have added the google map api and i was advised to restore to a previous version. i have been sitting on the restore screen for over 2 hours now and nothing is happening. i can see the ftp files being built and restored but they are not being moved. how long does a 620 mb site take to restore from a local backup? how can i get my site to work?