Frontier lost my daughter in laws bag for 52 hours causing them to miss 2 nights of their honeymoon in Jamaica. At the last minute her carry on bag was checked in so they could sight see during a 7 hour lay over. Her carry on bag contained her passport. It was a horrible experience. Frontier is not taking any responsibility for expenses incurred due to their negligence. The customer service was horrible and after multiple calls and several mixed messages the bag arrived. No one even call us, as promised. I was told that they would cover the expenses. I mailed all the documentation (signed receipt) and they said they are not responsible for expenses incurred due to the lost bag. I found out that they have no tracking/scanning system for luggage. I also have pictures of the reclaimed luggage area when I went to pick up the bag. The huge room was packed full, the door was unlocked, and it was unattended. I waited 10 minutes for an employee to show up. I had the employee sign a letter with all the facts from our experience including verifying the unlocked unattended office. I don't fly often but with the TSA regulations and the security wouldn't you think leaving bags without an employee manning the office should be a concern? My expenses were documented and realistic. Any suggestions to get someone to help at Frontier?