This is more of a "what should have I done" question. It doesnt appear you insisted on anything (be more assertive in the future), and dont have the time (time

This is more of a "what should have I done" question. It doesnt appear you insisted on anything (be more assertive in the future), and dont have the time (time is money, next time make sure to get paid), just move on with your life, lessons learned and all that.