Not quite correct. God is bound by his own word. He is a God of truth and cannot lie (Titus 1:2). When it says in scripture that if we repent, our sins will be forgiven (Ezekiel 18:23; 33:11; Acts 5:31; 8:22; 1 John 1:9); he is bound by that promise, if we fulfill our part. He cannot deny his own word. Provided we fulfill our part, he is obligated to fulfill his. He cannot go back or reneg on what he has said.
I am not aware that I said anything contrary to this.