You can find the answers to many questions here, it’s very likely someone before experienced the same problem as you do. Otherwise you can also submit an issue ticket and wait for our help.
When you're done with collecting goods using shopping cart at D16's online shop and you just clicked the Proceed to checkout button below the shopping cart's contents to finalize transaction.
Or you just clicked Purchase button next to the single item at the online shop you're interested in.
You'll be moved to the order's checkout to complete it (select payment method, fillout delivery details etc):
To use the coupon you received enter it into the Your Coupon Code field and click Update button to apply discount to the order.
Use the search or contact our staff:Submit a ticket