MTN has not delivered the device in over 14 months and i an billed on a monthly for something i never recied.

I have upgraded my phone online with MTN in October 2019, the device was never delivered and the courier have confirmed that it was sent back to MTN . When i contact MTN they tell me to go sort it out with the courier. Its been 14 months now paying R500 per month for this phone that i dont have because i do not want to compromise my credit record. i have now reported this matter to the ombudsman. I have references from the courier and they confirm that the device is with MTN . This is so frustrating because no one is willing or trying to assist, they just keep on sending me from pillar to post.