I work as an R&D engineer in the Automotive industry. In 2018 My Supervisor(boss) approved my application for a PhD program based on a 5-year distance learning model, with a UK-based University. I subsequently went through the official UK application procedure and was given a non-conditional offer from my university of choice. The planned start date was Feb 1, 2019, with the final submission date being fixed for Feb 1, 2024. The PhD research activity was planned to be the majority of my daily work schedule and would consist of several internal work packages or projects. The goal of the PhD was to establish me as a resident expert in the field of Orthopedics and Ergonomics in Automotive Seating Development. Unfortunately, my supervisor was then fired in November 2018. Shortly afterwards my new supervisor stated he had no funding available and forced me to cancel my PhD program. I was then unable to start in 2019. Now 4 years later, my supervisor is trying to recruit a new Candidate, to pursue a PhD study based on my core Ideas, which would have been central to my research activity. I have actually filed patent applications on several solutions to be evaluated in the proposed new research activity.
Am I being plagiarized here and is my supervisor's activity unethical and/or illegal?
Also, can anybody advise me on what I should do in this situation? Could this be perceived as a breach of contract in my job, as the PhD activity was approved as part of my professional development Plan?