The writer is speaking to Yahweh in the third person. This can be stated in second person. Alternate translation: "It is time for you to act, Yahweh" (See: [[rc://en/ta/man/jit/figs-123person]])
This is an idiom. Here "have broken" means "disobeyed." This is a way of saying the people have disobeyed God's law. (See: [[rc://en/ta/man/jit/figs-idiom]])