I am a PhD student. At the beginning of my study, my supervisor told me that they are able to help me with my topic. However, later I found that they cannot even understand what is my topic. They wasting my time for more about one and a half year without any comments or help with my topic. Then, I worked entirely alone with my topic. I have done the first chapter of my study, they asked me to be co-authors with me for nothing but just because they are my supervisors. I refused this. Then, they asked me to add them in the acknowledgment as they are the supervisors of this project. They asked me to write this in every single paper of my Ph.D. papers. They did not help me with anything, they even cannot understand the difference between my objectives. My question, Due I must write them in my acknowledgment? If not what is the rule for this problem, how can I treat with this behavior?