Dandruff /something else. Roots removed!

I have dandruff like earlier i had flakes and itchy scalp but after using medication like fluclear shampoo/// kenz sal lotion / cesol lotion / chiffon hair oil i removed all the flakes like alot of bad dandruff which was there which used to shed if used to touch my here went away but i m soo tensed that the main dandruff the roots those roots are sooo strong on my hair its not going my doc said i have sebbhoria but i used all his medications daily my scalp still has a strong roots of bad dandruff which isn't going at all its like the strongest roots like if i avoid the medication for sometime the dandruff will come back deadly previously i also have used medications like niosalic - 6, funginep lotion it had gpod affect but nothing to those hard roots what can i do to get those hard roots removed