Shopify Charged Me After Canceling My Subscription — Billing Error Complaint

I used the Shopify Advanced Plan for approximately three months, during which I paid $1 per month as part of the promotional period. Before the final billing cycle in September, I canceled my subscription and completely closed my account.

However, on October 29–30, I received an email stating that a $90 payment attempt failed due to insufficient funds in my account. I am extremely frustrated because this charge was attempted after I had already canceled my account and ended my subscription.

I do not accept any charge attempts made after cancellation. I request that this issue be resolved immediately and that no outstanding balance or charge be reflected on my account.
My registered email address is k***********@gmail.com**.

I expect an urgent response and confirmation that this billing error has been corrected.