When to Change NLP Practitioners?

Hi All

I currently have trichotillomania in the form of eyebrow pulling.

Last year I went to see a practitioner for three hours of sessions, costing approximately £500. This session cured my thumb sucking (although it wasnt the reason I went). It stopped my eyebrow rubbing for about 2-3 months.

I went back to the same practitioner after I started rubbing again. This time the treatment lasted about 1.5 months.

I originally went to see this practitioner for two 1.5 hour sessions (a £500 program). The subsequent session was £125.

Upon hearing that the session had not worked, without note of concern (and almost complete disinterest) I was told I should keep coming back for sessions.

Having already spent so much I am not keep to do this. Not simply because of the sums of money I have spent, but because of the practitioners notable lack of respect for how much money I have already 'invested' with him.

I have been reading about another practitioner in my area who has lots of experience of working with patients with trich. Should I change?