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My visa is exprising on 12 of june 2018 while i am leaving on 5 may 2018.
I dont have enough time to wait for my visa cancelation. So my question is that, if i dont cancel my visa and go back to my country is it going to be a problem ??? I have tried to talk with immigration but they dont respond.
Please guide me

But why my university saying one week is not enough?? I contact them and they saying at least two weeks. So if i submit by friday can get back my passport on next friday?

I saw a post from one of univeristies, saying that cancelation is applicable to thoese having more 3 moths visa validility while in case is only 1 month