On my BBA mark-sheet another students pic. is printed instead of mine, when i approach to PTU-DEP they don't responding to my problem

I ve completed my BBA(LE) from PTU-DEP according to the regional center-head of PTU by mistake another student of BCA (LE) 's photo printed on my mark-sheet & its been 1 yr i ve not get any original certificates or marksheet of any exam or any replay from the university , wt should i do plz advice.