Transform.Position Wrong Execute

public class Respawn : MonoBehaviour {
private Vector3 StartPoint;

// Use this for initialization
void Start () {
    StartPoint = this.transform.position;

void OnTriggerEnter2D(Collider2D collision)
    if (collision.gameObject.CompareTag("Respawn"))
        //transform.position = StartPoint;
        transform.position = StartPoint;
        //this.transform.position = StartPoint + new Vector3(Random.Range(-7f, 1f), -7f, 1f);


Hi I put the walls out of the game screen as you see in the video and the picture. I want to reset the position when I hit the top walls, ie when I go out of the game but the position is reset but this is constantly repeating.Because if the ball strikes the walls and hits the walls I want it to return to the first place.I do not want to replay the scene, Score: "The score is reset when you play the scene again because of the score, so there is no other solution?

Video :

I can not do what you said is not there any helpers?