Those pesky red tones eh!
Given the underlying tone in your hair it is very hard indeed to get the colour result you require. ...More >
What I would suggest to you would not probably be what you want to hear. This needs an expert to assure you get your desired result (it will stop you having to spend a further 8 hours having colour correction).
If you were to go to a salon I would suggest having multi tonal highlights and low lights with your predominant colour been the warm brown you truly desire. The multi tonal highlights/low lights will stop you dominant red tone showing.
I wish you the best, and get rid of the ípesky redí