Mumbai University — Not giving marksheet which was supposed to be given last year and misguiding.

I have visited mumbai university (santacruz) 5 times uptil now and the person who was supposed to do the job was misguiding me by saying (this is not my job) and when i reached his senior he agreed to do the job and said me he will call when marksheet will be ready. And same day after few minutes he met me downstairs and he angrily said me that he will decide if he will give me the marksheet or not. I requested him to please give it to me since i need it for some other purpose urgently. This is my brother's marksheet i am asking for, my brother is in another state and due to covid reasons he cannot come here. I even submitted an application that i will be receiving marksheet instead of him which is issued by my brother. Also the sir who is supposed to do this job said ( agar tum aise baar baar aaoge toh me tumhe dunga hi nhi marksheet ) i come from a far distance, he does not have any understanding that it is hard for me as well to come to mumbai university. And he says i am a liar despite the fact that i am ready to give them every single proof. very poor behaviour of the staff. This is our educational system, they should have a little professionalism in their work. Please help since they still haven't gave me my brother's marksheet.