How to cancel the SMS fee in the postal savings card?

Hello, please bring your ID card, bank card/passbook to the counter of Postal Savings Bank in the province where you opened your account to cancel it. Or edit the short message "QX" through the bound mobile phone and send it to 1 185. (letters are not limited in case), QX messages must be sent between 9- 16; After cancellation, the bank will not refund the deducted fees.