How To Get Rid Of Pimples On Face?

Respected sir, My name is patel girdhar ,i am a student.I havemajor problem is pimple.many medicine used and no change in my face in 3 years.i am very depressed this problem ,and this problem through ,very boring life live .so sir any guidence,and what s do and don ts. Plz sir ,give me a right direction and and face groove is major problem.I sure that you can help me. THANKS