Zerodha — Mcx fut crude oil trade sell may 16 fut

Address:	Bangalore, Karnataka, 560078
Website:	www.zerodha.com

My id is DL0498 i had executed sell on may crude oil mini 1 contract may future at 2657 on 15 march but on 16 march zerodha RMS stopped and closed my position in loss citing reason that shortage of money whereas less than 40 percent of margin was used 102 points was difference in buy (2759) and sell (2657).
according to rules 3100 rs margin was blocked and only 1020 ruppes negative was thr not even 50 percent margin and they closed my trade.

i want justice...refund of my lost money. and possible future profits.
how they could close my trade so early