Why did someone else send me 1 messages as a guest, but I received more than n messages, and it is still increasing?

The problem of short message center of mobile company; Generally speaking, after you receive the message, you will send a confirmation message back to the SMS center, indicating that you have received it and don't need to send it again (otherwise, the SMS center will send it continuously for 48 hours, which is the same reason that you can still receive the message from the other party when you turn off your phone within 48 hours). The landlord said that the SMS center didn't receive the confirmation message the first time or didn't recognize it because of the system congestion after receiving it, so I thought you didn't receive it, so I will continue to send it to you until the SMS center system recognizes your confirmation message. Answer over