Thank you for using JA. I am Loren, a licensed attorney for over 35 yrs and a certified expert on JustAnswer since 2009.
The format here is a chat. So, feel free to respond with follow-up. I am happy to continue until you are satisfied your questions or concerns have been fully addressed.
I am sorry to hear of the problem. It is understandably weighing heavily on you and I look forward to answering your question and assisting you with this by providing quick and accurate information you will find helpful.
The only way to recover on this and protect your rights is to sue for patent infringement and breach of contract. Since this requires equitable remedies, there is no real "low-cost" option.
You will need local counsel and hopefully you agreements provide for recovery of attorney fees.
If you need assistance finding local counsel try Martindale Hubble (site rules prohibit us from referring specific attorneys). Many attorneys, themselves, use this site to locate attorneys outside their jurisdiction or expertise:
It is a huge worldwide database searchable by location and specialty. The attorneys are peer rated. So, they represent the top of the profession.
I am happy to continue if you have follow-up questions.
Otherwise, if you have no further questions on this, thank you for using JA and best of luck.