If I had called, i.e. prayed, as this word is commonly used, to wit, unto my Judge, for a favourable sentence, as he now said, and therefore it was needless here to mention the object of his calling or prayer. Yet would I not believe that he had hearkened unto my voice; I could not believe that God had indeed granted my desire, though he had done it; because I am so infinitely below him, and obnoxious to him, and still full of the tokens of his displeasure; and therefore should conclude that it was but a pleasant dream or fancy, and not a real thing: compare Psalms 126:1.
Related Commentaries of Job 9:16
Job 9:16
16 If I had called, and he had answered me; yet would I not believe that he had hearkened unto my voice.