Institute Of Banking Personnel Selection [Ibps] — wrongfully cancelling my allotment for treasury officer scale ii by hpgb

Address:

New Delhi, Delhi, 110025

I, mahtab hussain khan, (Roll no.[protected]) was provisionally allotted in himachal pradesh gramin bank for the post of treasury officer scale 2 through ibps rrb cwe vii.
On the day of documentation (28/01/2019), i requested for a few days extension as i had not yet received my experience letter from my previous organisations. I had receive my experience certificate on 31/01/2019, which i had communicated to them immediately (Send scanned copy through mail). But till then they had already cancelled my candidature. Just within 2 days it is very unfair to cancel my allotment. I even met the chairman & general manager of the bank. They are not even willing to listen anything.
I request you to kindly look the matter urgently as there is no fault of mine.