Can anyone tell me what’s going on with these postal savings deductions? So much deduction in two days.

I know that the short-term deduction is for the SMS service fee, which is a service where you get SMS notifications when you withdraw or deposit money. The same goes for SMS messages! Postal savings are the worst in this regard! Damn it, it makes me so angry! Damn it postal savings! Grass! When I applied for the card, the salesperson opened the SMS service for me. After applying for the card, she told me that it had been activated. She said that it was free for one month. If you don’t want to use it after one month, you can cancel it! About a month later, the postal service sent me a text message saying that my free text message service was about to expire. If I didn’t want to continue using it, just reply with the xx code. I immediately responded to the text message to unsubscribe. But a few days later, I received a text message deducting 30 yuan from me. I went to online banking to see that it was a short deduction. I had already canceled it, so why was it charged? I called customer service, and they said they didn’t receive my unsubscription text message! Damn it, you want to trick me! ? I went to the mobile business hall to check my text message records, which showed that the text message had been sent successfully. When I took the text message records to the post office, he was so frightened that there was an error in their system! Obediently give me back 30 yuan!