OK, but it would be a lot easier on those here who are trying to advise you if the story wasn’t revealed drip by drip.
Anyway, on the basis of all that advice in the context that you’ve now revealed, I’d be comfortable with letting your resident complain all they like because there’s been no change to the Common Property within the scope of Sect 65A and there’s been no unauthorised expenditure (in fact there’s been none at all).
My faucet is now closed!