hello, i want to cancel my order

See: Apple Store - Viewing & Changing Orders https://www.apple.com/shop/help/viewing_changing_orders

Need to cancel order

i cancel my order but my money has not been refund

Most likely your device had been already shipped.

Per Apple return policy, you have 14 days (from the date of purchase) to return it and ask for a refund.

Regards

Giulio

See the reply marked as "Apple Recommended" (the first reply in this thread).

Regards

Giulio