That sounds dodgy from your ISP, Chorus sent out a mailer to RSPs saying they'll courier these out...
"From 7 March 2017, if your customer’s missing a power cable, we can courier one at no extra cost. They no longer need to wait for a site visit by a technician."
This includes identifying before the order or once the order has complete, your RSP just needs to submit a fault indicating a power lead is needed."