Samsun and mtn dis....honoring warranty on device

With 12 months left on mobile contract at mtn my device which is a samsung note 20 ultra.....yes very pricy item......gave up life and the screen went black. The device never had a fall or even a scratch on were taken to mtn the glen. They requisted me taking it to samsung since the product warranty is carried by samsung. All good and gave it in at samsung 7th of feb 2020. Around the 15th samsung declared that the device be replaced on warranty. All the time that mtn and samsung comunicated to each other no one bothered to inform me,the customer about anything. I phoned numerous times and when i get hold of either the excuse is the other is not doing their part. It is now the 23rd of march and still no word of when i will get my rwplacement. I have paid my contract now 2 months without a device ..... do i just continue paing for a service non existing ? I am very dissapointed with the service from mtn the glen and from Samsung. When i want to lodge a complain at samsung i was informed tbat i need permission from a manager in the for of him giving me a reference no in order to lay a complaint... really is this where we sunk to in South Africa?