Okay so first off I have red hair/straw berry blonde hair too! I used to hate it until about a month ago I saw some pictures of celebs with really nice hair that color like lindsey lohan and miley cyrus when she had red hair. Remember that there are 6.billion people on this planet, of that, only 2% of them are naturally redhead. Don't make the mistake of dying my hair brown (IT TURNED OUT BLACK) and now I will never really be as ginger as I was again:(
But if you really want to get rid of it... u can mix baking soda with shampoo that should fade it:) and also use head and shoulders shampoo and conditioner. It takes out color alott. Worked for me. Also I never tried a product called "color oops". But I heard great reviews about it. So you can try that if you want. Good luck. I have the same problem. I am ginger/red hair. And I died it "medium ash brown" and I left it in too long so now its black. I'm trying to fade it because the red was beautiful. These are working for mee. Again good luck:)