Amazon India — unauthorized credit card charge by amazon prime

I - elinor jacob-have a charge on my canadian charge card from:
On december 21, 2019
By: amazon prime 9v54d9xz3 amazon.com/billwa on
For: $13.77 usa converted to $18.60 canadian.
My last payment was may 2019 to amazon. Ca order number: d[protected]
Order total: cdn$ 7.99 digital order: may 27 2019
I have not been an active client since june 2019 and i have not re-enlisted with amazon prime

Refund my $18.60 cnd and cancel whatever program this is.