Yup. Had same with a S3 Apple Watch and again yesterday. Didn't get a confirmation it had gone through - just kept banging in my details and after I gave up the "Awaiting Payment" tag on the order disappeared and the money left my account.No idea what's going on. Have re-keyed my payment card and its not authorising. Have even tried a totally different card and its not going through either. Is this the issue others have had when they used Apple Pay initially?