Really Amazon!!!!

I subscribed to audible books in 2021. Cancelled before the 30 day free trail period but they did not stop deducting monthly subscription fees. Long story short- I had to change my card to stop the payments going through. Now more than 2 yrs later I discover that Amazon is taking a monthly amount of R79 from my card. I do not know what for, I have not subscribed to anything, I have a hunch that they just started deducting as soon as I bought a book with the new card details. This forces me to not buy from them again, and makes me furious because they are unable to sort the problem, I can not cancel anything as I am not subscribed to anything!