Hi Lilly,
We had the same sort of issue at our complex, well we wanted the gutters cleaned.
We were told by thew body corporate that this is a owner expense and not a body corporate expense.
On further investigation we found that if the townhouse has a shared downpipe (2 townhouses feeding into one downpipe for example) then is was the body corporates responsibility, if the townhouse had it's own downpipes, with no other townhouse dependant on the downpipe then it was the owners responsibility.

Hope that helps