How can Mobile cancel the 20 yuan traffic package?

Hello, call the operator's customer service hotline directly, and then transfer the manual service to the customer service to cancel. For example, in telecom, you can directly call the telecom customer service number 10000, and press the 0 key to switch to manual service, explaining the service that needs to be cancelled to the customer service. If it is mobile, call the mobile customer service number 100 10 customer service.