Cannot Update Pages preinstalled on Macbook Air
I cannot install any updates for Pages or Numbers that I bought pre-installed on my Macbook Air. It comes up with "This update is not available for this Apple ID either because it was bought by a different user or the item was refunded or cancelled." It purchased over a year ago and haven't got around to sorting it until now because it wasn't really used too much but now they are I'd rather the newer versions.. Anyone have any ideas?
MacBook Air, OS X Yosemite (10.10.4)