1. Contact the lessor immediately. You should contact the costume rental dance as soon as possible, explain the situation and ask for suggestions for repair or compensation.
2. consider repairing it. If the damage is not serious, you can consider looking for a professional seamstress to repair it. It may cost some money, but it can save the cost of changing the whole suit.
3. Buy new dance clothes. If the damage is serious or beyond repair, you may need to buy new dance clothes. At the time of purchase, you can consider negotiating with the lessor whether you can get discounts or other concessions.