It's literally impossible to get a spell or any magic to increase your height.
The main factor of your height is genetics. If your parents are short, you will be too. If one is short, you could be anything. Other factors are posture, amount of sleep, getting the correct amount of vitamins, and even exercise. If you have stayed that height all throughout puberty and gotten little to no growth at all then it's best to see a doctor as that might be due to a medical issue.
But seriously - you may just be short and have to live with it. I'm 5'3" and have been this tall since I was ten, as I am 19 as well. All three of my siblings, even my younger siblings - are all taller than I am. It can't be changed.