I have not had the opportunity to see what they've filed.
Normally the party moving for relief would cite facts and law in support of the motion; often that's required by the governing court rules. But if the issue is that you've failed to even state a valid case, that may be obvious to the court even without a full briefing. If you believe the motion is untimely, object to the filing. If you believe you have valid defenses to the motion, brief the court on your defenses.

