Indira Gandhi National Open University — fst-01 marks not updated

I am a student of ignou university persuing ba.
My enrollment id is[protected].
Regional centre delhi 1
Study centre 07174.
I have been trying to reach all the possible numbers and emails provided by ignou but was not helpful. I also complain for the same in igram site
Grievance submit token (Gst) :[protected]
This is the complain token no.
. I was responded that my regional centre has submitted zero marks for my fst 01 assignment.
I have submitted all my assignment on time. I also have the slip that was given to me in time of submission.
After given a 30-35 page assignment how is it possible to not even get a single mark. If my study centre has misplaced my assignment it's not my fault my hardwork should not be wasted. I want a proper response and copy of my submitted assignments needs to be shown why i get a zero.