Once the order is placed at the exchange, the execution is beyond the purview of API. Can you send an email to [email protected] with the order ID of this particular order?
This looks like a Stoploss order with a limit price and not a SL-M order. With a normal Stoploss order, a limit order is sent when trigger hits. This doesn't guarantee execution if limit order is not filled. Check this link to see the difference between SL and SL-M