When a person is delivered from drugs and then starts using again, does God turn his back on this person or is God willing to deliver this person again?

We believe that God is very willing to give another chance.

Forgiveness is a very important topic in the Bible. In 2 Chronicles 30:9 we find the example of the Israelites who continuously turned away from God and had to come back and ask for another chance. It says "...for the Lord your God is gracious and compassionate. He will not turn his face from you if you return to him."

There are other examples in the Bible, however this one is the clearest to show us that God will not turn his back on us if we fall from his grace.