I met a lovely lady at the bcna forum who had the same problems as yourself following chemo. She stated she did invest a lot of money at Ashley and Martin and it definetly helped her. She hasn't got a thick full head of hair but she states it's thickened enough for her to live with now. She also had her eyebrows tattooed as they didn't return.
I know the treatments are expensive but if you add up the money you would spend on hair care normally and the money of the various products and wigs, you might be able to justify spending this on yourself. They may be able to provide payment options and money back guarantees if there is no improvement..
Just thought I'd let you know. I tagged her in some time back (Feb) but no response here unless she messaged you privately. Kath x