Yes, you can. The couriers make contact on the cellphone number provided.

Should you be unavailable, please advise the courier when you will be available to receive the delivery.

Deliveries are not time-based; should the courier arrive at the given address with no one to receive the delivery, they will contact you and attempt a second delivery. 

If the second delivery fails, the order is returned to the Tarsus Distribution Johannesburg branch, and a credit will be processed.