checked my e-mail.
I had two order ID : 35819069800, 18251102262
but I have one license.
I think that an error when the last payment.
so I had to pay two months.
please check and refund, and cancel the automatic payment of unlicence order ID.
Contact support: https://support.avast.com/support/tickets/new
Hi JAEJIN,
Both order IDs correspond to the same license. It is a monthly license so it renews each month, and each renewal gets a new order ID 
thank you. but Why pay twice did in the same month?
But the order 18251102262 is for August-September and the order 35819069800 is for September-October. There is no double payment.