Suggest Treatment For Dry Scalp, Dandruff And Acne

Hello Doctor. I am having lot of dandruff in my hair and my scalp is very dry and i am losing lot of my hair and i am also getting acne on my face. i tried many shampoos but unable to get rid off dandruff. i am very depressed. Please suggest me a shampoo which can solve my problem. Thanks, Jyoti