Project purity help!!?

I have 7 saves on my xbox hard drive and 2 of them are of me lv13 at the very end of the game in the project purity rotunds. Here's where I need help my all my other saves are of me at lv5 miles away from the end but when I try and get out of the rotunds the doors are locked any help I want to get out because I haven't done that much other than the main quest and 23 side quests help? Please don't be diplomatic and write " the best thing to do is to start again" or "why don't you just play from the other games"