PDFFiller review: Unauthorized credit card charges

It seems that I inadvertantly subscribed to pfdfiller on [protected].
From "my account" on your website:
Account ID
[protected]
Registration date
03/17/19
Last login
03/17/19
I discovered this in 2021, and cancelled the subscription.
On Oct 11, 2021 I received a confirmation of the cancellation from "Sarah".
This is copied and pasted from Sarah's confirmaiton email:
======================
Your pdfFiller subscription was cancelled
Sarah from pdfFiller Unsubscribe
Mon, Oct 11, 2021, 12:21 PM
Sorry to see you go
We have canceled your subscription. Be sure to save all the documents on your account as they will be automatically removed in 30 days.
=====================
Yet on my credit card account, the following charge for 101.76 suddenly appeared on 11/9/2023
11/9/2023 DEBIT SUPPORTPDFFILLER.COM [protected] MA 24335493312900016000017; 07399; ; ; ; -101.76.
I request that you immediately refund what appears to be either an honest error or a fraudulent charge. I prefer to resolve this direction with you rather than file a complaint with the MD Attorney General's Office of Consumer Protection. https://www.marylandattorneygeneral.gov/Pages/CPD/Complaint.aspx
Thank you for looking into this matter and issuing a prompt refund.
Tom Smerling
email address of my pdffiller account: [protected]@smerling.com