What is the reason for a girl's feeling of God's dissatisfaction and His non-acceptance of her prayers, even though she prays Qiyam al-Layl and Fajr then sleeps, knowing that she communicates by phone with someone she is inclined towards?

Your feeling that God is displeased with you and that your prayer has not been accepted is a feeling that is desired from a servant after performing good deeds, as Allah the Almighty says: "And those who give what they give while their hearts are trembling [with fear]," but this must be accompanied by the hope that the deed will be accepted. As for contacting the person you are inclined towards, this is from the steps of Satan that must be severed immediately. If he desires you, then let him propose to you.