Replacing worn carpets is a decision that can be made by the committee – it’s maintenance, not a change to common property or an improvement. The relevant website says this: “A body corporate must maintain the common property in a good and structurally sound condition.”
Of course, “good condition” is a variable concept, but worn carpet can present a trip/fall risk and that would be reason enough for replacing it.
Presumably your committee has meetings, so you should write to the secretary and ask that a motion to replace the carpets be included on their next agenda.
If they don’t have meetings between AGMs, ask that they call one to consider this.
If they refuse to call the meeting or have the meeting and refuse to replace the carpets, you can seek orders via the tribunal system.
You start with a request for conciliation HERE.
If that fails, you can seek adjudication – starting HERE.
Good luck.