Getting unwanted tones out

I was blonde for many years and went a reddishy brown last year. The past few months I've slowly been going back to blonde. I finally got it all blonde to where I want it. Well so I thought. I ordered some extensions in Platinum Blonde from Sallys. My roots & first couple inches match up pretty well with the fake hair but the rest of my hair kinda has an orange look to it. Kinda reminds me of a peachy color! So i can't even wear the extensions cause it looks awful. I don't want to put any bleach on my hair right now. Is there anything I can do? I've tried unred mixed with conditioner but didn't do anything? Thanks so very much!