Jock itch from 6 months. It permanently?

I have jock itch problem from past 6 months..In staring when I use antifungal creams it use to give relief..so I stopped antifungal creams within 1week. I am using candid dusting powder daily after bath...But my problem is recurring..I have consulted doctor One month back..he checked and told secondary infection has happened..he gave ketoconzole cream for applying.and Allegra tablet ..I have used both as prescribed.i took a bath two times a daily.and applied cream twice..Allegra tablet once in night..staring 10 dyas ..I felt like I am getting cured. But 10 days..after applying cream also I feel like itching..I will clean the area properly two times a day.Now I started Ayurveda.i am applying trichoderma cream and talkeshwara Ras tablet twice a daily..now also I feel like itching in night and after 6 to 7 hours of applying cream..skin in that area has become full dark..i have itching sensation on my personal parts and inside buttocks.also.. please suggest how get rid of it permanently???