I bought Skyrim: Legendary Edition for PS3 recently and I got to the part where you are going to the Thalmor Embassy for a party. But when I go there no one takes the invitation and it won't let me in. I've uninstalled and reinstalled everything multiple times and have the latest patch but cannot get it to work. I've also tried to wait 30 in game days to let everything respawn but nothing works. What's going on? I already had to restart with another character because my other save was freezing all the time. Now I can't finish the game as this character. Does anybody know how to fix this?

reload an earlier save

I can't. All my saves are up to this point.