Just thought I'd update anyone who is interested. Although I've sent them 2 emails over the last 2 weeks about the estimated amount and the creditors who haven't put in a formal claim - I've had no response. I want to find out why they haven't sought to exclude them yet, to clear up what figure we do actually still owe, but they don't want to contact me it seems...
I've received a letter today telling me that I've got to pay 10 more months at £1005 and one month at £411, but this may change if they get more claims in.... which is what they said before I questioned the estimated amount.... I give up! It's like they have totally ignored the emails I've sent.
I could call them but I don't have a specific contact and as such, there isn't a great chance the person who takes the call will be able to help anyways - I'll just get generic responses as I have in the past.
I guess I'm pretty powerless, just gotta pay for as long as they tell me I have to - I have to admit, this isn't as straight forward as they made it out to be in the beginning

So, altogether, I'm not happy, but I suppose I've gotta be near the end... fingers crossed