Danone Ultramel custard

Hello, I bought a carton of ultra Mel custard. When I got to the bottom of the carton, noticed a big black thing come out the carton. I cut it open and found another piece of yellow slimy thing. I've been a loyal customer for years. I'm highly disappointed to have experienced this. It is so disgusting knowing that we've finished the whole carton and now at the last servings this happens. I can't imagine what effect this will have on my and my families bodies. I am really disappointed in Danone. I wish I could add the video to this message.