In all fairness she could have very well not seen it. Or even forgotten. Having inquiries come in from customers from various different outlets, I'm suure had you emailed via the website you would have gotten a response. When I had a biz customers could contact me via etsy....youtube...or my website. I checked them frequently but an email through a website is immediate esp if it goes through a contact form. I don't think she intentionally ignored you.
EDIT: ok I saw where you emailed through the website. Does this product contain cetyl alcohol? If she reduced the amount of cetyl alcohol so that it may pump through a bottle this could/would effect thickness and conditioning/moisture performance. Cetyl alcohol makes a huge diff in moisture from my experience and even 1% less can be noticeable.