'Instead' in the Bible

but this is [the beginning of] what was spoken of through the prophet Joel:

And Peter said to them, “Repent [change your old way of thinking, turn from your sinful ways, accept and follow Jesus as the Messiah] and be baptized, each of you, in the name of Jesus Christ because of the forgiveness of your sins; and you will receive the gift of the Holy Spirit.

instead they had some points of disagreement with him about their own religion and about one Jesus, a man who had died, but whom Paul kept asserting and insisting [over and over] to be alive.