I am getting billed after I cancelled my subscription

I canceled my Illustrator subscription back in July, and I am still getting billed monthly since then.

I got a confirmation email for service cancellation, so the cancellation is supposed to be confirmed.

I got billed twice after July without using the service, so I had to block Adobe from accessing my bank debit card in order to stop paying to Adobe. I still get a monthly bill though.

I noticed that there are at least three other posts in the community that have the same issue. So it seems that this is a known issue with the billing system. 

Can anyone please help with stopping these billings?

Thank you.