I did not say that one should always include "got". However, in this case, it seems to be better than without. "You do not/don't have a chance" would have been fine (nobody would add "got" here). "Not a chance" on its own is an idiom , and is fixed, so one would not add "got" here either (http://dictionary.cambridge.org/dictionary/english/not-a-chance). However, based on some research, "I have not a chance", seems to be used by natives, and is considered "informal" (which does not mean it's incorrect). Once again, I did not say your answer was wrong, I only said "'You haven't GOT a chance' would make more sense" in this case. At the end, the top comment encourages the Duolingo team to accept "you haven't got a chance", which has been liked by 12 individuals, so perhaps one day they will accept both suggestions.
thank you it I'm going I'm going home today or is it too soon not be there today if possible could a pleasure speaking on a few more hours I'm sorry you had such the way it was so good but not asleep I'm not sure how I'm gonna take the kids home but it is what I'm sure it would be a good time