@GraemeLG said:
Three pair of aluminium sliding doors to balcony are also very old and increasingly difficult to move – the accompanying fly wire screen doors are currently held together with rivets.
The irony here is that there’s a very good chance that those doors are common property and the owner could have them fixed at the Owners Corp’s expense.
Your problem is that if you insist on the repairs, the owner might want to put the rent up. But you are paying top dollar anyway so they should be glad that you want to stick around.
Talk to them and try to reach an amicable solution.