The app and platform in general is often hit by bad stability. Technical errors with the exchanges and responses from customer support takes weeks. Stay away.
So. I live at street adress xxxxx 6,6. Thats how I entered the adress line. Book Depository sent the book to... 66.
Now, they tell me, that I entered 66 in upon my order. But all my documents, including their confirmation mails show that I truly entered 6,6. They screwed up and even blaim me for typing wrong, when I did'n't! Terrible business. Keep away from them.