Using Blackberry so this will be short. My 17-55 2.8is lens broke last night. The zoom wasn't working smoothly yesterday and suddenly froze in place I used moderate force to free the stuck barrel and it popped free. Now the barrel with extend with the zoom ring but will not return it also will not stay in place and fully extends when pointed down. Autofocus is also spotty. The lens is 6 months out of warranty, and suggestions for a quick fix? Or does it need to go to canon?

