LTE Sim card delivery

<p>I migrated y contract's airtime, sms and data bundle because I did not want to upgrade my contract but only receive a different bundle. MTN asked if I wanted an LTE Sim card delivered which I agreed to but only during specific dates which I specified because I was not home. The enxt day I received an SMS stating that the Sim was going to be delivered (after specifying that I was not going to be home). I tried to get hold of MTN to prevent them from delivering but they were impossible to get hold of. The delivery man phoned to ask where I am to receive my Sim who'm I had to then send home. I then received another SMS saying my Sim card was going to be delivered again outside of the specified dates, but this time I didn't even get a phone call for deliver. Finally a received an SMS for deliver during the dates I was home but no one has arrived to deliver it. I tried to phone MTN to ask what has happened to the deliver however my calls wouldn't go through because "I had insufficient airtime" although I have 80 minutes to call. Once I got a call centre person to put me through rather than phoning the number directly I was put on hold and have been waiting for an asnwer for the past 20 minutes with no answer. </p>