While the flight left on time, the experience afterwards was terrible. Starting with the flight attendants who were very unprofessional (there were times during the flight when I felt the crew was hiding from the passengers at the front and back of the plane chatting amongst themselves) and had very poor communication skills. All announcements over the intercom were poorly delivered and many passengers were left confused on what was said. To top this off, the airline left my checked-in luggage at my departure city and I've been calling/emailing their customer service representatives ("CSR") who show no empathy or urgency to address my situation. First off, I have an Airtag on my luggage and when I told them that the luggage was left behind, they didn't believe me and tried to convince me that it wasn't missing. During my subsequent communications over the phone with the CSR staff, I go on to find out that the staff that monitors emails and phones are completely separate and unable to communicate with each other. After I've emailed/called, I was promised that their airport staff will contact me right away. It has been over 24 hrs and I still haven't gotten a call/email. I have made subsequent inquiries over the phone regarding the status of this call and the CSR cannot tell me. Luckily, my luggage has since arrived at my destination (on a subsequent flight) but now it is just sitting in the airport. I'm praying that this will be dealt with soon after which, I will never fly this airline ever again.