The tracking number is on the order, and updates land as notifications.
Open the order in You → Purchases. The tracking number is on it, and the carrier's updates come through as notifications.
A parcel that is late is usually just late. If it is marked delivered and you do not have it, or it has not moved for several days, use Report a problem on the order, inside the 48 hours after dispatch, which is what pauses the money.
