What does Quand avez-vous dire qu'on vous à Lagos?
It does not mean anything in French, probably the result of a
bad autotranslation engine, in which case the original sentence (in
Portuguese?) would help.
"Quand avez-vous" = "When did you"
"dire" = "(to) say"
"qu'on vous" = "that they (...) to you"
"à Lagos" = "in Lagos"