Hi @huangbeiju ,
Welcome to the community!
We're sad to know that you're considering to cancel the service with us. We're able to locate an account using your community details. We'd like to have one of our Account Specialists to contact you to discuss details of cancellation. Let us know your best contact number and preferred time. In case you need a reference: How do I private message (PM) in the community
One of our Account Specialists tried to contact you earlier today to discuss details of account cancellation unfortunately no avail. Please confirm your best contact time so we can advise them to contact you again.