I booked flights for my family and later some decided they weren't coming. I have free cancellation as a diamond member so I made another booking with the correct number of people. After a few days I went to cancel the original flight. I wasn't able to do it online as I usually can, i assumed because it was an international flight. But I was able to cancel through a chat agent. I received cancellation email and everything seemed fine. Today I received a notice from my credit card that I was receiving a refund from frontier that I wasn't expecting. Frontier has cancelled the flights I wanted to keep too, but didn't notify me at all about those. I am on the phone with an agent now who says she can see that I cancelled the unneeded flights and later AFTER that the "back office" noticed a duplicate booking and cancelled the flights I wanted to keep too. Currently on hold trying to see if anything can be done but I don't have a lot of faith. Any suggestions here or am I SOL? At least I figured this out in advance. No notification from Frontier seems especially shady.