actually i had written techmahindra 390 call last week. but today i am unable to cover that. Unable to buy it. RMS rejected it. when i enquired then they said its in a ban. while techmahindra is not banned. just that option. So that ban might be for intra or series. I m user of zerodha
Please check if your position is still open. Because ban is limited to new positions. Existing /open positions can be squared off. No doubt on it.
Banning and opening are real time. So may be when you inquired, it could be in ban and got released later.
Some brokers allow positions even on banned instruments, but strictly for intraday.
*Ban wont be series specific. If tech mahindra is banned, it will be applicable to all its derivatives contracts across all series.