What should I do if I can't receive the second confirmation message after opening the over-deduction?

Can't you receive the confirmation message after sending the message? This kind of money-making SMS is generally very efficient. Maybe the signal there is not good, or the security software intercepted it. See if there is any record of harassment interception. If you can't wait, send it again. Don't worry, a Q number won't charge the same card twice a month.