Need co-worker help me in Cocos2d project

I need a developer with highed-skill in Objective C and Cocos2d to fix bug of my project and implement some missing features: 1. Fix bug crash when leave the game scene (when I press Back button, and then press the level again, the app crashed without exception warning) 2. Implement the web frame view in side the Shop scene. I want a scroll list of new items (this list should be update every time player open the shop) I need it completed in 3 days, so if you don't have time, please don't bid. Notice: Freelancer who comes from Vietnam are welcome :)