Failure of Mondo mobile to honor upgrade of cellphone contract

I did an upgrade with 3 of my vodacom contracts with a sales agent Nicole on 22/09/2017, based on the price of phone that was being offered to me .i was informed that a courier will deliver the device with 5-7 days , but a note would be made to have the courier contact me before delivery to ascertain a suitable time. The courier did come to my home . He did inform my son that he would return at a later time when I would be available to sign for the device.He did not return . I received a call from the courier on the 3/10/2017 and delivery was agreed on for the 9/10/2017 between 8am and 09h30. No delivery was made . When I contacted Mondo mobile I was informed by Rasool that they would have to cancel the upgrade and then a sales agent will read out the terms again and the my device would be delivered within 7-14 days. I sent 3 emails to ********** .Till date, I have not received a response. Further telephonic conversations with Rasool results in being informed that the sales supervisor would contact me , and then on my last call , being informed that my upgrade has already been cancelled and that they cannot offer me the upgrade that was initially offered. I find this totally unacceptable .