how do I permanently treat a persistent skin fungus?

Hello!

I have been treating a very persistent skin fugus with Terbinafine Hydrochlorine tablets (I've completed the dosage) and 2% Ketoconazole cream with little success.

I understand the tablets are hard on my liver so I would like to try a natural remedy instead.

The fugus has now spread to my scalp and am looking for a treatment that won't damage my hair but will effectively rid me of the skin/scalp ailment. 

 Thanks so much!

 blessings, 

Darlye