My daughter age 22 got white patches on het face...

My daughter age 22 got white patches on het face in the beginning acvording to doctors its vitamin D deficiency,she drank 3 injection one in a month but these patches got increased on face,,,she told me that she used a foundation cream may be because of it ,,,doctors saying its vitilligo n UV-B is the best,,,,but a homeopathic doctor says she used a cream which have high amount of mercury ,,,,he gave her selsun blue shampoo to use as a face wash .it might b slow but results are not as we acpected... Help to make her face clean n fair as before.