I agree with Tulula that a statement of that leaseholders account is most likely what they want.
The Op could ask them, as Tulula suggests,
" Just to be clear, do you want a simple list of amounts demanded of and paid by you, or something else? "
Based on the information posted, I offer my thoughts.Any action you then take is your liability. While commending individual effort, there is no substitute for a thorough review of documents and facts by paid for professional advisers. More ramblings atleaseholdpropertymanager.blogspot.com