That's because you're treating acne only from the surface. You need to find the root cause and treat it internally with homoeopathic medicines.
Next Steps
You can consult me online on Practo so that we can discuss your case in detail along with your mental health, likes and dislikes, stress (if any). I will prescribe you medicines that will suit your entire case as a whole.
Health Tips
Wash your face thoroughly with water 3 times a day, especially when you return home from outside. Drink 2 to 3 litres of water in a day. Apply aloe vera gel.