MTN non responsive to handset delivery

I upgraded my MTN contract online more than a week and a half ago. I received confirmation that the upgrade has taken place and that a courier company will make contact with me to deliver my handset. I have sent 2 emails to MTN requesting feed back , with no response. I contacted their call centre on numerous occasions , and am pushed from pillar to post, with no one being able to assist me. I find the lack of communication very disapointing, and a simple follow up as to when my hand set will be delivered would be appreciated.