Hi looking for some advice I had a client Yesterday that got her roots filled in with L’Oréal highlift ash and 30vol!! Been totally fine before but it has went a lot warmer and you can see difference! I’m not happy with it so will have to redo it!! Any advice do I go back in with same with stronger devolper? Or any ideas ( sorry have no pictures) Trying to keep away from bleach as her hair is very fragile! Thanks again