Delta Air Lines complaint: Delayed Baggage

On Sunday, I flew from Lisbon to Amsterdam to IAD to ATL. I purchased my ticket from Delta. Please note that I have been a happy Delta Customer for 20 years until the rudeness I experience today. When leaving Lisbon at the KLM counter I asked the representative if I needed to get my bags at IAD. She explained that my bags were checked through ATL and that I should pick up the bags in ATL. Upon my arrival in ATL, my bags did not arrive with me. A pleasant baggage clerk advised that my bags was at IAD and that I should have handled them in Customs at IAD. Following our discussion, she provided me with a file reference number and that my bags should be delivered to my home by 6 pm on Monday. It is now Tuesday at 4 pm, no bags. I called the 1800 number waited on the line for 50 minutes and Dominique advised that there had been no movement. My bags were still at IAD and she would request the bags again and that basically that was all she could do and a manager would call me if I wanted to escalate the issue within 24 hours. I said please have the manager call me and hopefully heshe can have an update on my luggage. Dominique was also very pleasant. Simultaneously, I was texting with a baggage claim representative that needs training in tactdiplomacy or at least customer service. Without the benefit of the previous two conversations, Sevyn in the Delta Baggage Service Center did advise that my bags were scheduled to be on Delta 2568 but it was my fault the bags did not get to Atlanta. I disagree with Sevyn’s position because I specifically asked the KLM (Delta’s partner) about my bags when checking them. Additionally, two previous Delta baggage staff persons had advised that upon my flights arriving in ATL that the roadie would deliver them to my home. I am a 20 year (generally Silver Medallion) customer and the rudeness of the text (even capital letters) after waiting for my bags and waiting on the phone and waiting for text responses is the epitome of lack of service. Please note I am only referencing the Sevyn’s written comment and his position that he was instructed by his lead to provide me with the information.