I heartily agree.
Churchwood will take 2 upfront fees from you before they pass you over to Kingsgate, who are their own Insolvency arm. If the IVA is approved then you will have paid 62 payments instead of 60, and if it isn't then you have lost the 2 upfront payments, at which point they will, like as not, pass you back to Churchwood for a Debt Management Programme, at which point you may have to pay some more upfront fees.
The question as to whether you should have been encouraged to use further credit doesn't really need answering, I suspect you know that it would be wrong to do so once you have realised that there is a problem.
Moral of the story? Don't EVER pay upfront fees for an IVA, go direct to an IP, peferably via
www.iva.com where you can have a look around, read reviews etc. Most IP's will not expect you to make payments prior to an IVA being approved, and those that do will refund in the event of rejection, so don't be afraid to ask what happens to your money in the event of rejection.
Regards.