ITR filed u/s 119(2)b is not processed by ITO. what to do??

we have filed itr of A.Y. 2011-12 u/s 119(2)b in the month of February 2017. but they have not processed it till now and refund is not received.

(Almost 4 years we are waiting and reminding them)



Now they are saying that refund is not processing as oir system is not permiting. system showing last date to proceed it was it 31.03.2018.

its department fault that they didn't done their job on time.

No my question is that . what is the to got refund . where we file a grievance for it. if yes then to whom it will be files ( i mean cit or elsewhere)


please guide me