Hi Aspirant,

The scenario mentioned above is something that happens due to the lack of proper addressing to them . It happens in big universities. Now what you can do is that try to contact them through mails or phone calls. But if the problem still persists in then directly visit the campus with all your required documents like fee receipt and refund documents,etc. Even then also if the problem persists in, you can contact the higher authorities of the institute.

Good luck!!