Ask your local lawyer but if no compensation ever exchanged hands and paperwork signed, you may well own your IP depending if it's work for hire etc. If so, yo

Ask your local lawyer but if no compensation ever exchanged hands and paperwork signed, you may well own your IP depending if it's work for hire etc. If so, you may have an option of licensing said work. However, it may not be worth the time, money and effort. That is something that you will have to decide and possibly chalk it up to a learning experience. But regardless, do not do any more work. Good luck...