Got selection in exam but not got appointment

Respected experts! i have appeared in combined class 4/ chowkidar recruitment test 2015, an exam conducted by vyapam on 12/07/2015 and got selected in a department name sanchalanalay nagar tatha gram nivesh (commenly known as town and country planning t&cp, bhopal) under the preferences of department filled at the time of application with 91 marks out of 100 marks.Result was declared on 18/12/2015 and after 3 moths when i contacted to tncp told me that we have not demanded for this post but as per the vyapam advertisement and rule book of exam the post was there thawhy i had filled appllication. when i contacted to vyapam the said we have correctly selected you and others as per preferences given by the candidates. Till now no progress and i mstill waiting for appointment . What should i do? cam i file a case for this? under which catogery? service matters or others? please guide.