What should I have done?
First reduce sail. With a roller reefed headsail that is easiest to reduce. Then put a reef in the mainsail. We have a Pearson 323 that doesn''t handle well without a headsail. But with roller reefing the genny has a poor shape. But the good news is that with a lot of wind even a poorly shaped headsail works good enough. I would prefer to have three different size hanked on headsails and may go to that eventually. I don''t know about a C-30. I had a Mac 26 that sailed just fine with only a mainsail. With the mac I would have dropped the genny and maybe put on the working jib and reefed the main. Over 25 knots the mac worked well with a double reefed main alone.