refund
US /ˈriː.fʌnd/
UK /ˈriː.fʌnd/

1.
退款, 退还
a repayment of a sum of money, typically to a customer who is dissatisfied with goods or services bought.
:
•
I asked for a full refund because the product was defective.
我要求全额退款,因为产品有缺陷。
•
The store offers a 30-day refund policy.
该商店提供30天退款政策。