Theist: God exists. If there is no God, then who created the world?

Me: Why is world a creation?

Theist: Because it exists. Then it must be created by someone, right?

Me: Exactly. So, you are right. GOD EXISTS.

Arbiter: So if the creator exists then the creator must have had a creator? And the creator of the creator must ALSO have been created by a creator ad infinitude?