Talk to General Physician on Seborrheic Dermatitis

I was diagnosed by seborrheic dermatitis since few years back probably 5 years ago. I have visited many renowned skin specialists/ dermatologist, they gave me medicated shampoos and lotions. I have expended a huge amount of money but my problem still exists. Slowly and gradually it’s causing loss of hair, baldness and premature greyness. I want to know that this disease is curable or not? If yes than please advise me regarding this problem. My problem is just with scalp and little bit on face. My scalp is itchy with flakes and i am currently using baby shampoo after every 2nd day.