Dandruff and frizy, lifeless hair.

I have had dandruff issues and a dry scalp for a very long time, it's hereitary.Last year I went to a dermatologist and stared using practo shampoo and diprobate lotion and it completely removed dandruff.But recently, a month back, flakes started reappearing as my diprobate lotion usage became irregular.Now that I've started using it again, it's under control but I want to get rid of it completely.Also my shampoo is over so I want to buy a new shampoo.I have also gotten the lower portions of my hair colored a week back.When they used absolute repair shampoo of loreal in the parlour, my hair suddenly felt very soft and not dry at all.So I wanted to switch to absolute repair shampoo or vitamino from loreal for color retention.But I'm not sure whether it'll be fine for my dandruff problem.Also, the dermatologist told me not to use any conditioner so my hair became very dry.Loreal also has a conditioner for colored hair which I wanted to buy. I plan to continue using diprobate.