Try this plugin.
Note: As you can probably tell from all the comments, such skip plugins are not always guaranteed to work. Make sure you read the readme on how to use it, or you'll be pulling your hair out.
An alternative would be to use KSE. You may be able to use it to forcefully advance the plotline, but I've never done it so I don't know if it will work. If you like, you can PM me one of your savegames on Iziz as well as a list of any mods/patches you have installed. I would be willing to see if I can do anything with fixing the game.
- Star Admiral