If all fact are as stated it seems that Zero Guys must have had some accounting error, reporting wrongly the position size of this trader, the NSE penalty reflect this reported shortfall of margin of the trader (where maybe no real margin shortfall was there).
Given that all these process would be automated no people would be involved . . .
But once reported by the client, a honest broker would definitely sort things out . . .
All the above assuming that actually only 100 NF long with 40K margin is a fact . . .
and the options position were all long and paid for with nothing short
Thanks