Sri Krishnadevaraya University — I did not received my convocation

I applied to my degree convaction on 17th notification in 2016, actually i completed my degree in 2014 my reg.no 10011480 when the notification released on that time i applied but i did not received, my classmets are collected to their convaction on college, but my convocation is missing, then on that time i approached to skuniveristy examination center then they are asked to acknowledge slip but i missed that one, they said that applied again the convocation so i recently applied the convation and their simply reject my application and said that already convaction is issued so you can apply now dupplicate only, but in college doesnot have my convaction but sku showing one proof to issued proof but i have somay doubts on that proof all names are printed except my name. pls check on it and give my convocation