We guarantee to refund your money if you're not delighted with your purchase.

如果你对购买的商品不满意，我们保证退款。

《柯林斯英汉双解大词典》

I'd like to refund my ticket.

我想退票。

youdao

The college refused to refund her tuition.

学校拒绝退还她的学费。

youdao

On Sunday,Eurostar did promise to offer those who have suffered long delays or cancellations a full refund and compensation.

VOA: standard.2009.12.21

India's market regulator has ordered the group to refund money collected from investors within three months.

BBC: India businessman Sudipto Sen in court over alleged fraud

If a recession evaporates all those gains, the hedge fund operators do not have to refund these fees.

FORBES: Doomsday Investing

The business group was ordered last month to refund the money for failing to comply with financial regulations.

BBC: India's Sahara group to refund $3bn 'in three months'