Don't pass up a chargeback because you may have heard that someone else had a problem. Perhaps they did not properly document their case or perhaps there are some missing facts. Or perhaps the Chase front life staffer handling the dispute just screwed up. Doesn't mean that yours won't sail through.

In your situation, the fact that Expedia promised a refund and then did not process one makes this all the easier.

The better documented, the harder it is for the vendor (Expedia) to push back and more importantly with the US system, Expedia's merchant acquirer will only go so far before it allows the chargeback and takes the funds administratively from the Expedia chargeback holdback,