No it's the other way around. Scotia and Mackie clients agreed to participate in the buy-in process by selling shares to the exchange at a premium for immediate delivery to close a failed trade.

The bill is sent to the original sellers who failed to deliver the shares to the oriiginal buyers. This is usually evidence of naked short selling, as some parties sold shares about 3 days ago, that they didn't or couldn't deliver by the 3 day settlement date.