NIIT — NIIT Course Completed Still GNIIT Certificate not issued

Hi Team,
This is my 3 time Complaint but Resolve
I have completed my GNIIT (Software Engineering) Course from NIIT Mathura Center and Transfer to Niit Preet Vihar Center, Pincode 281004 and my details are Student ID:- S1500A6100236
I have been running behind the institute for the past 4 years but still they are not ready to support and guide me properly. I was been told in the beginning of joining the course that placement will be conducted after course completion. Forget about placement, they are not even providing course completion certificates. My father was a farmer. and my brother was a lever He had worked day and night of Mathura just to pay my niit fees and make my career bright. But nothing worked out even after paying such a hard earned money around one lakh fifty thousand rupees niit is not ready to give my certificates. Everytime i go to meet them they make some or the other excuse and tell me to come some other time or they say my course validity is over, I need to pay ten thousand more and my course will be downgraded. I don't understand why I have to bear all this extra amount even after paying my complete fees. If they would have issued my certificate I would have got a job in the IT field long back. But due to niit spoiling my career I have been going through a lot of problems.
This is really a high time for me. Please try to understand my situation and issue my certificate without any delay. for any other clarification you can contact me through email or can call me on my registered mobile no that is [protected]

Hoping for your best support.

Thanks & Regards
Virendra Singh
Contact : [protected]