There are a few points of contention here:
The referral of your case and confidential information from CreditFix to Mr Buchanan without your consent: Complaints to regulatory bodies are against individual IP members, rather than insolvency firms, so you have little recourse here, unless you want to take them to court under date protection regulations.
The lack of contact from Mr Buchanan. Although he uses Ebenegate, the supervision of the IVA is down to him personally. You could complain to his regulatory body via the Government Gateway here:
https://www.gov.uk/complain-about-insol ... actitioner. You will need to raise your concerns with Mr B first to give him an opportunity to put things right.
In any event, you will need to comply with requests from Ebenegate for the purposes of your review. From previous posts from those who deal with Ebenegate they will increase your payment by £20 or £30 regardless of figures you supply !!
For the avoidance of doubt, should any issues arise, I would be inclined to email Mr B direct and outline the situation, along with the complaint for non-response.
Finally, Ebenegate have, in the past, asked for third party access to bank accounts, allowing them to pull down statements at will. My advice would include the phrases " Long walk" and "short pier" ! Leave them to do it the traditional way, where you send them copies you have obtained yourself.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014