Slow (spell) Enemy unit, problem with duration

Hey! I am working on a slow spell that basicly will slow my enemies when cast on them. I have had problems with it lasting forever, so I tried fixing it, but instead it's not working at all. Here is my script:

 function speedReduction(reduceSpeed : float){ //retriew float from Projectile.js
     lastCalledTime = Time.time + afterSlowTime;
       
         moveSpeed = moveSpeed - reduceSpeed;
         projectorSlow.gameObject.SetActive(true);

//so the movementspeed wont pass under 0

         if(moveSpeed <= maxSlowAmount){
             moveSpeed = maxSlowAmount;
         }
         
         
     
 }
 
 
 //And then this code is supposed to take away the slow when no slow has be applied for a time
 
 if(lastCalledTime < Time.time){
 Debug.Log("Slow Stop");
     moveSpeed = startMoveSpeed;
     projectorSlow.gameObject.SetActive(false);
 }