I have been treating prostatitis using difference types of antibiotics since last 3 years, still i could not recover from it. please advise what todo?

Prostatitis: See a urologist. Prostate is not an organ which is penetrated effectively by most antibiotics, so the choice of drugs will limit their efficacy. You also need to promote drainage, first with sitz baths, frequent ejaculation, and when the acute process calms down, prostatic massage may help. But please see a good urologist as there may be other problems associated.