Possible meanings are 1) this is the prophet speaking. AT: "Yahweh has rejected your calf" or 2) Yahweh is speaking. AT: "I myself have rejected your calf" (See: [[rc://en/ta/man/translate/figs-123person]])
The people worshiped an idol that looked like a calf, so Yahweh is speaking of their worship as if it were the calf itself. AT: "Because you worship your calf idol, your worship" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Yahweh asks this question to express his anger about his people being impure. "I am angry with these people because they have no desire to be innocent." (See: [[rc://en/ta/man/translate/figs-rquestion]])