Background: In 2022, I was introduced to a professor belonging to the UK who recommended me for getting a job at an Institute "A", in India. The professor also trying to get some collaborators in "A". Later I got a better option at institute "B" in India and I joined there. The Prof. is a well-known figure in his domain. In March 2022, He gave me some suggestions regarding a work, which I executed. In September 2022 I prepared a manuscript which may be accepted in a reputed journal. But, when I joined institute B in September, he stopped all types of communication with me. I need some advice if you faced such situations earlier:
How can I publish this article safely? Suppose I submit the manuscript with his name. He may complain that I am using his reputation. If I submit the article without his name, his complaint may be more critical. Now, there is no physical or virtual communication between us.
What should I do or not do such that the chance, if any, for future collaboration will not be harmed any more?