Consult a skin specialist. Curing it.

I had groin infection and consulted a couple of dermatologist. The first one prescribed a few medicines such as Terbinafine 250 mg , Intraconazole 100 mg , Sertaconazole 2% ointment and Hydroxyzine 10 mg which I had for 2 months. The infection reduced a lot but then once I stopped the medication it returned back. After which I consulted another dermatologist who suggested other medicines Fluconazole 200 mg , Albendazole 400 mg , Luliconzazole 1% ointment and Levocetirizine Dihydrochloride 5 mg , which I had as prescribed for 2 months. The first doctor said it was ringworm and jock itch together , the second said it was fungal infection. The condition is better now but it seems to be returning back. My major problem is the cure for it. Also that the medication has turned the skin on my groin and around the region so dark, almost black from original fair skin which makes it look extremely bad. If there is a specialist out there , please do recommend the right medication for curing it.