I had this issue somewhat recently. I complained to AC on twitter after waiting a month or so (at cow's suggestion). I complained again on twitter after waiting another week. They manually credited the eups to me, and eventually the real ones showed up:
04-Aug, 2015: 12 credits added - Deposit
22-Aug, 2015: 12 credits earned - Flight Pass or Promotional Activity
24-Aug, 2015: 12 credits cancelled - Deposit
I should have spent them!!! I had two days to do it. lol.
That was for a flight pass purchased June 25th.