LinkedIn - This sounds odd but I was getting the run around regarding a lost/damaged bag. During a trip through Asia my bag got 'lost' in Beijing Capital (PEK). It took them days to find it, then said they would deliver it, then said it's still lost. I had been calling far too much during my trip to enjoy it. One night I upgraded my LinkedIn membership for more 'InMail'. InMail allows you to contact people you are not connected to. I messaged marketing directors, COOs, director of North American operations... It pushed up the claim and got much better service. A few responded much later but all were gracious to take responsibility and own the issue.