Creditfix's complaints procedure is outlined here - https://www.creditfix.co.uk/complaints
What seems to have happened here is as follows. At the time your IVA was proposed, your debt was thought to be a certain amount. This is called the Statement of Affairs amount, or SOA.
However, the amount of claims that have come in from creditors have been in excess of this to a level that is beyond the supervisors discretion to admit them. The claims can usually come in below 115% of the SOA amount and be admitted without seeking creditor approval.
Your claims will have exceeded this amount, which technically amounts to a breach because the claims are above what the supervisor has the discretion to admit. Your IP now had to call a meeting of creditors to ask your creditors for 'permission' to include the new claims, or the increased total amount.
To make this more attractive to the creditors, your IP sounds like they're proposing an extension so the dividend rate doesn't drop too much.
I would contact CF for a detailed explanation of exactly what has changed and what evidence the creditors have provided etc. It's your right to know.
And Foggy, I agree - it's suspicious that CF have a higher than average number of these. It's almost like they're intentionally leaving debts off to make approval more likely, safe in the knowledge that there'll be a variation further down the line that they can more fees from as a bonus, and of course more supervisor fees if they extend the arrangement. Highly suspect!
I work for one of the UK's biggest Insolvency Practitioners. All posts I make are my own thoughts and/or opinion and are not the views of my employer. None of my posts constitute legal advice and should not be taken as such.