Karnataka State Open University — marksheet not received

Address: 560047

I had enrolled in distance mba in the year july 2013. I have appeared for all the exams. The last semester exam was held in the year july 2015. But till date i have not received mark sheet of the 4th semester and also the certificate. Please do the need full. My admission id : 13651mbds0024

I had enrolled through the university 18 business school. https://www.u18.edu.in/en/

They say they have affiliation with ksou. Now they are not responding. And asking me to call up the university. I have tried to call up on so many phones numbers as given in ksou website. But nobody is giving any clear answer as to why even after passing the exam the marksheets are not delivered. It is two years since i have finished the exams.