No delivery after paying for overnight courier

We placed an order for a Toner and overnight delivery service on the 16 February 2015. After calling on the 17th February 2015 to follow up on the delivery we are informed that they have no stock and it will take a further 2 days to deliver. What is the overnight courier option for???<br> <br> I left a message for the manager Carlos to return my call as he was in a meeting. Only for him not to call me back. I called back at 16h20 (hours are 8-5pm) and I was informed that he left at 4pm. How convenient!!<br> <br> I doubt I will get any response from them. Absolutely terrible service!!!