"Therefore thus saith the Lord, Behold, I will bring evil upon them, which they shall not be able to escape; and though they shall cry unto me, I will not hearken unto them." - Jeremiah 11:11 (KJV)
Why doesn’t God hearken unto them?
Reason: because their hearts are far from Him. They aren’t truly focused on Him.
Proof: they immediately call upon other Gods, after they called upon Yahweh:
"Then shall the cities of Judah and inhabitants of Jerusalem go, and cry unto the gods unto whom they offer incense: but they shall not save them at all in the time of their trouble." - Jeremiah 11:12 (KJV)