Forum:Mission do-over help

Okay, tried some online gaming to see if it made a lot of difference in loot. Naturally some quests popped up again (grrrr gearbox, finished what I could. Can't turn in a mission involving Tannis and the Crimson Fastness, had It's Like Christmas added to my current missions along with Local Trouble. Thought I could jsut finish my Marcus Sweep-Up and get another go. Which I can't. Finished it and the only thing that did get checked off for It's Like Christmas is the Steal Loot box (more grrrr knowing what this means). So right now I need someone to help me on PS3 for the Tannis mission (Get Some Answers),, the It's Like Christmas Mission and if you feel like hanging around, I could use some help going through the underdome from the start seeing I don't feel like going through all the round, just to die on a boss who's health recharges too fast (grrr Sledge). Got about an entire inventory full of Oranges I don't use for my class and I have the spare time to help in Craw runs (as gunslinger or sniper, either seems to work for me).