thank you, i'd follow on the international student adviser

But, I have submitted two statements one covering 1st - 31st October and one covering 1st - 12th November.

That's covering 42 fiscal days.
Unsure why isn't that enough?

I've just got an email from the UK Decision Making Centre, that they were unable to conclude the application at this time as they require additional information, Please provide the following documents: Bank statements showing sufficent funds over a 28 day period issued within 31 days of application ...