Sorry, sometimes these things just slip through the net.
If there was a written or minuted agreement that the doors and windows would be in keeping with the rest of the building, propose a motion to your strata committee that the owner is in breach of the agreements and should replace the doors and windows with appropriate designs.
If the committee refuses to act, you can take the committee to NCAT under a section 138 asking for order compelling them to take action. Usually, telling them that you intend to do that gets them moving as it’s an double hit – they have to defend the Tribunal action and still have to go through the hassles of forcing the owner to remedy their renovation.