I have used the above link to contact you but here is what I get from you.
I only have one account associated with the email. How cannot you find any thing?
"I checked the account "dengliu" associated with the email you are writing us from and did not find any paid membership there. Do you recall having any other account apart from this one? If yes, could you please provide me the username and the email associated with that account so that I can locate it in our system and help you out with it?"
Then the charge you saw must be associated with a different account/email. The purchase gets directly tied to the account and there apparently is no purchase associated with this username/email
I have used the above link to contact you but here is what I get from you.
I only have one account associated with the email. How cannot you find any thing?
"I checked the account "dengliu" associated with the email you are writing us from and did not find any paid membership there. Do you recall having any other account apart from this one? If yes, could you please provide me the username and the email associated with that account so that I can locate it in our system and help you out with it?"