Hello ​@Peiyun, welcome to our Community! I completely understand that you want the money back, if you have paid double. Let's look at a solution together! I checked your subscription right away and I see that it has been cancelled, is that correct? Indeed, I see that you have made a double payment of € 3,63. This amount is now also shown as credit in your account. It will not be deducted from your next invoice, because you will not receive a next invoice. 

Since your subscription has already ended, the credit amount of €3.63 will be paid out automatically within 4 - 6 weeks. Now I have made a big exception for you and filled out a refund form. You can then expect the amount back from us within 14 days at the latest. I have also sent you a confirmation email about this! 

If there is anything else I can do for you, just let me know!