Siddique's constant chatter on the phone riles Nash, who abruptly hangs up and brands the business hopeful "annoying".
Watch Team Phoenix in action below:
On this week's Apprentice, Lord Sugar challenges the two teams to buy and sell products from a warehouse.
Given £150 as a starting point, they must reinvest their profits and buy more items from the warehouse as the task progesses.
The Apprentice airs on Wednesday night at 9pm on BBC One.