I was involved in internship to develop Mock question papers for JEE. I made nearly 15 question papers for which I was paid Rs 10500. Some of the questions they found were copied from the internet (this they told after 15 papers), so I declined working further. They asked me to resubmit the questions for which I was paid which I could not in due time. Also, during the internship, I was asked to give videos consisting of video lectures. They said they will give either the shares or the income. After making some videos, I said I could not go for shares as I dont have understanding of it and would like to go for per video basis payment which they denied. They never paid for the videos which I made. In this whole process, I never signed up any agreement between us. They are now asking me to return the stipend money stating they have not used the questions submitted by me. I dont know what to do. Please help.