Rotate player always in the same direction

Hi! I've been working with rotations animations and other stuff in unity.
I want to always rotate my player in the same direction. How can I do that?
My problem is if Y value of rotation is negative, player will rotate toward left, however if Y is postive he will rotate toward right. This is my code. Thank u everyone.

Code (CSharp):

1. bool rotationAllowed = (m_GolemInput.MoveInput.sqrMagnitude > k_MinRotacion) ? true : false;
2.  
3.         //Clmaping magnitude
4.         Vector3 playerInput;
5.         playerInput = Vector3.ClampMagnitude(new Vector3(m_GolemInput.MoveInput.x, 0f, m_GolemInput.MoveInput.y), 1);
6.  
7.         Vector3 camForw = Camera.main.transform.forward;
8.         Vector3 camRight = Camera.main.transform.right;
9.  
10.         camForw.y = 0f;
11.         camRight.y = 0f;
12.  
13.         camForw.Normalize();
14.         camRight.Normalize();
15.  
16.         m_DesiredMovement = playerInput.x * camRight + playerInput.z * camForw;
17.         m_DesiredMovement = m_DesiredMovement * m_RealMoveSpeed;
18.  
19.         //Calculamos el angulo de giro para activar o no la animacion
20.         float anglesDifToTurn = Quaternion.Angle(transform.rotation, Quaternion.LookRotation(m_DesiredMovement));
21.  
22.         if (Math.Abs(m_GolemInput.MoveInput.x) > Math.Abs(m_GolemInput.MoveInput.y))
23.             anglesDifToTurn = m_GolemInput.MoveInput.x > 0 ? anglesDifToTurn * 1 : anglesDifToTurn * -1;
24.         else
25.             anglesDifToTurn = m_GolemInput.MoveInput.y > 0 ? anglesDifToTurn * 1 : anglesDifToTurn * -1;
26.  
27.         if (!IsMoveInput)
28.             anglesDifToTurn = 0f;
29.  
30.         m_Animator.SetFloat(m_HashRadianesGiro, anglesDifToTurn);
31.  
32.  
33.         if (rotationAllowed)
34.             transform.rotation = Quaternion.Slerp(transform.rotation, (Quaternion.LookRotation(m_DesiredMovement)), rotateAnimationSpeed * m_Delta);
35.  
36.         m_CharCtrl.Move(m_DesiredMovement * m_Delta);