When the FC system went back up, I called to cancel. The agent I got this time quickly cancelled both, the miles were back instantly, and he said he submitted a refund request for the taxes. Between my first call and this one, KL cancelled my original flight and put me on one exactly 5 hours earlier, so I deserve a refund of those taxes. If I never see the $11.20 from the delta cancellation, I am not going to lose any sleep.