Joke Collection Website - Public benefit messages - Why can't I get the SMS reminder after consumption?

Why can't I get the SMS reminder after consumption?

is it because the counter staff made a mistake and entered the wrong mobile phone number?

2 the signal is bad or the line is blocked, resulting in network congestion, and the text message may come after a while.

3 The banking and mobile systems are under maintenance.

if there is no SMS reminder for the transaction after a few days, you can appeal to the signing outlet, and the outlet staff will re-sign the contract for you.

4 the mobile phone number has changed. I went to CCB outlets with my ID card and bank card to change the mobile phone number notified by SMS.