As you know, Romwe is a large on-line shop, which has a large number of orders every day.
Our warehouse staff process those parcels one by one in chronological order.
When you place an order, it may show that one item is still in stock. But in fact, the item was pre-ordered by other previous orders, that is why we processed a refund to your Romwe wallet in advance. Wallet balance can be used on your next purchase or be withdrawn to your payment account.