Amazon refund missing

Ordered. A book online on 10 August 2020. The purchase price plus shipping was deducted from me credit card. Two days later the supplier, Windy Books sent an email claiming they are out of stock and that I could cancel. They also wrote that they would get in touch with the publisher to enquire about availibility of stock. I chose not to cancel. Afrw days later I noticed that Amazon cancelled the purchase. To date no refund. The app also leads nowher usefull to enquire. There is no trace of cancelled orders on my profile. Am I to assume that my money is gone? This borders on theft.