My postal currency card was detained in 30 yuan for no reason. What happened?

1. Please check whether the postal currency card has handled the business of withholding water and electricity fees.

2. Please check whether you have handled the SMS notification service. This service is offered in 3 yuan every month and 30 yuan every year, which may be an additional fee for this service.

I suggest that I take my bank card to the postal outlets to check the details.