chóngfù zhīfù huò jīn'é cuòwù qǐng bǎoliú zhīfù jìlù dào shōuyíntái héduì chǔlǐ

重复支付或金额错误，请保留支付记录，到收银台核对处理。

In case of duplicate payment or incorrect amount, please keep the payment record and go to the cashier to verify.