Well, you could go to a salon but if you really don`t want to, you could try a colour remover product, but also you could try a homemade formula which would probably be better than the product
.. The best I know is first getting 20-30 vitamin c tablets and crushing them, then get a dollop of shampoo and mix them, then add a touch of olive oil, and massage it into your scalp, leave it on for about 30 minutes or an hour, or even longer, the longer the better
, if it`s really bad, maybe use more tablets and leave for longer! This has worked in the past so hopefully it`ll work for you! Good luck! :) :) It should work!