hey!! I am so excited. Yes, it was a long time L-O-N-G slog of time- on like the 5th battle of the new contests? Ninja Spy dropped Sung Tai Ki!! hehehehe.
Log out of CXH and close it -> Follow the link from the Sex Friends menu in HH -> Sign back in on CXH -> Get a "congrats, now go back to HH" popup -> Go back to HH -> Return to the main page and get the popup to claim your reward OR -> Reopen Sex Friends and hopefully get the updated link to claim your reward.
If the above steps fail, you might be one of those who will need to send a support ticket or wait for a hotfix.
EDIT: OH, and you must reach World 2 in CXH to g