shǒu jī xiǎn shì yǐ kòu kuǎn dàn shāng jiā méi shōu dào shí, xiān bié mǎ shàng zài fù yī cì

手机显示已扣款但商家没收到时，先别马上再付一次。

When your phone shows a deduction but the merchant hasn't received it, don't pay again immediately.