No, the missed instalment before the adjustment is o/s. I expected to receive confirmation of the correct amount before paying.
That in this goes to court, they are going to win I think in this goes tocourt on these facts, they will get judgement.
I think the best you could hope for would be to do your own calculation(although there is a duty on the council to provide you with an up-to-datestatement) and pay them everything except in respect of the three weeks whenthe property was uninhabitable.
It really comes down to whether you want to spend a day in court for thesake of £100 whether that time is more valuable to you.
Remember that this is small claims that you will not get your costs backeven if you win although sometimes the judge will allow some out-of-pocketexpenses.
However I think your defence is substantially flawed based upon the maths