Hair dye. I live in UK. Help me go natural please.

Please someone help.

So last year I dyed my hair once aandd dyed it blonde. I left it to grow out so ended up with half head natural half head blonde. The blonde had discoloured and was fed up wanted it gone. So yesterday I dyed my hair brown and I absolutely hate it, it's too dark and I don't know what to do.

How can I ever get back to my natural colour? Any suggestions? I don't want to bleach my hair.

First pic- top half is my natural colour and bottom half is thee discoloured blonde.

Second pic- is the brown I dyed it yesterday. But It's way too dark for me and I need help getting rid.

PLEASE HELP 😣