### Chinese: 如果不行，请取消订单并退款
### English: If it doesn't work, cancel the order and get a refund
### Errors: There is a minor error of wrong grammatical register (eg, inappropriately informal pronouns). internal inconsistency (not related to terminology) at "get instead of request".

### Improved English: If it doesn’t work, please cancel the order and ask for a refund.