I opened online banking, mobile banking and short message service in an account of CCB, and deducted three yuan for short message service every month. Now I have added an account network.

This is unscientific. I suggest you go to the bank outlets to check. It should be that the staff accidentally added SMS service to your second account.

The debit account number of CCB is unique. If there is only one account to send text messages, it should only be deducted once. If two accounts open SMS, they will be charged twice. By default, the fee will be deducted from the account where you first opened SMS.

Therefore, it may be that the staff made a mistake, which led to the opening of SMS in both accounts. So you deducted the SMS fee twice from an account.