MTN failed to authorise my goods to be delivered

I app**** for a laptop contract with MTN and it was approved on the 27 October 2015 and delivery was supposed to take place within 2 to 10 days of approval. Ever since then I've been calling MTN Direct sales to find out when will my goods be delivered. I'm continually being told they send an email to the sales person and the manager to find out what's causing the delay and they\ll call me back. That hasn't happen! Now the story I'm getting is that the goods are by the couriers but they awaiting MTN to give authorisation to deliver. My question is if the contract is approved what's difficult for MTN to send authorisation to the courier company to deliver the goods. Everyday I call the call centre agents tells me we've sent an E mail to the manager and they'll call you back but nothing happened ever since. The only time I got a call from them was when the application was ongoing. To me seems like the sales person just wanted to get the sale done and they not worried about whether I receive the goods in time or not. This is demoralising considering that we try to remain loyal customers to MTN. "