Hey Spazz sorry to hear that, I can relate. This literally happened to me about 15 min ago. I FINALLY beat it (it was a pain! I'm also not that good but getting better at the game) and got that error message, kicked to the main page. Logged back in and saw that it didn't give me credit nor could I restart from the final boss. Just disappointing because that was not easy.
S
SpazzticZeal_XBL
@SpazzticZeal_XBL