Blond Hair dilemna

This is a bit of a long story, but here I go...

A year ago after many years of blond hair I decided to go back to my natural haircolor which is 8 NA. My stylist told me I needed a 6G and that it would fade into my natural haircolor. It did fade into a L8 but with the worst gold undertones possible and it did not suit my cool complexion at all.

After months of trying to fix it with 8N and 8NA, the gold persisted. I decided to bleach and tone my hair a L10NA. However, it is way too light in some spots and my hair is heavily damaged. I look washed out with my pale skin.

So I have many questions :
What are my options, should I keep the blond but try to tone it darker ? Or should I attempt to dye back to my natural haircolor ? Should I do cap lowlighting with a demi in my natural haircolor ? oh and by the way, I also would like to keep my length and grow out my hair,  is this possible with light blond hair ?