I had the same problem and tried loads of different products. Then I found one that actually works and its actually made in a town near me!.
I used it for 3 months, I noticed fuzzy hair growing covering up the old "Digestive biscuit" now its actual normal hair and you could never tell. I have a few friends, one of which had Alopecia, 4 months in she had short hair.https://watermanshair.com/
- I am unsure if they sell it in the uk and its not as expensive as you thought (I almost died when I tried regain), costs about £9 per bottle. ($15), expensive for shampoo but I feel its worth it.