After you defended the objection, the Trademark Office made a ruling in your favor, but the opponent was dissatisfied and filed for review of the objection. You have to continue to fight against the opponent. It's hard to say how sure you are of winning. It depends on whether the reasons are sufficient and whether the evidence is strong. This depends on the actual situation. However, if the opposing party is still not satisfied with the reexamination result, it may take judicial proceedings, and you will have to continue fighting. I wish you victory!