Is there a SMS notification for the driver's license cancellation test?

Yes, because it only sends you a message a few days before your exam, saying that you are going to take it.

In this case, you haven't made an appointment yet, just cancel it, so there is no news, just like you didn't send you a message immediately after you made an appointment. In other words, you canceled the newspaper and didn't report it, so I didn't send you a message.

If after you make an appointment, your mobile phone receives the message that the appointment is successful, then you can't cancel the appointment on your mobile phone. You can only go to the local vehicle management office to cancel the exam.

Anyway, you canceled successfully.