I hope a qualified hairdresser didn't leave you looking like that if you had asked for candy floss pink?
If so, you need to go back and get them to put it right.
Presumably you wouldn't wash your face in fairy liquid?
So don't use washing up liquid on your hair. All it will do is cause a lot more damage as the detergent it contains is far too harsh. (It's a bit like thinking that toilet bleach is the same as hair bleach or teeth bleach...! ) Just ask yourself, does washing up liquid turn the water green?