be automatically paid

first, i can’t speak eg well srry

avest It’s been paid. There is no history of mailing addresses.But the payment message was printed on my cell phone.
How can I get a refund??
i don’t know refund ID
I have only one email address.
But I have never received an email regarding payment.

https://support.avast.com/en-ww/article/Refund-request/