iStore: A sour experience

Ons Friday, 29/11/2019 I purchased a Apple watch online. On Saturday, 30/11/2019 I sent an email to cancel the order as I wen't and bought a new watch at my local iStore. On Monday, 02/12/2019 I sent a reminder to cancel the online purchase. On Tuesday, 03/12/2019 I received a message that the order has been concluded and that the product has been shipped. I called the call centre, who confirmed that the order has been cancelled. Needless to say, the phone was still delivered and I called again. The operator was amazed that the order was delivered as it showed it was cancelled. Then the Apple watch was billed to my credit card. I am really disgusted by poor and slow service from MyiStore. The courier came and fetch the watch, unopened as I received it but still no refund. I'm sitting without my refund and without the watch... I have sent many emails and made many calls to no avail.