The 13PC Set is set up to ship as two separate boxes, due to the nature of its size.
The tracking number (on the tracking page), will display "1 of 2 piece shipment". Clicking the link will show you the tracking information for the second package, along with the delivery date.
Please allow 1 to 2 days between shipments before reaching out to customer service. Sometimes the carriers will deliver each box on separate days.