How To Get Rid Of The White Spot On The Foot?

my daughter 18 years old, he has white spot on foot from five years, we gave many medicine and puva therapy but no result, one person told melono cell can fill where lose the cell, so pl suggest how can it be possible or other like patches or any fast process, i will be thankful whole life. we live in india state punjab city ludhiana contact 0000 and email is YYYY@YYYY