If not done already I would recommend that you make a complaint about Parish & Bell (and Foot Pain Pioneers) to the following organizations:
Consumer Which Magazine on email at extra@which.net
Trading Standards on internet at www.Consumer Direct.gov.uk (you just need to fill in a quick form to make the complaint)
BBC Watchdog on email at watchdog@bbc.co.uk
I and others have done this already and their general response is that they will act if they get more complainants.
Here I paste model letter in case you want to save time (please modify it according to your case):
To Whom May Help
A foot treatment company called Parish and Bell offered 99% success rate of being cured of a very common but difficult to treat problem –plantar fasciitis-. They offered “unique” orthotics at extremely high price in comparison to other clinics, but they ensured full refund if the problem was not fully solved.
A few months ago the company went under. They did not communicate this to me (and I am quite certain to any of their clients either). The result is that treatments are incomplete and they of course did not give any refund.
The amazing thing is that a new company has emerged with almost exactly the same strategy. It is called Foot-Pain-Pioneers. The owner of Parish and Bell, Les Bailey, seems to be the boss of this new company.
I tried to contact them asking for continuation of my treatment and did not get any answer back, and I know other cases with the same experience.
Over the internet it is obvious that many people have been affected. Actually it is surprising how this company also upset professionals.
Please visit
http://www.podiatry-arena.com/podiatry-forum/showthread.php?t=31533&page=2
https://parishandbellaffected.wordpress.com
http://whatconsumer.co.uk/forum/other-goods-services/3365-parish-bell.html
Hope you can help