Upgrade done but handset not received

I am an MTN client for more than 15 years. I have upgraded my contract (This was already an issue due to the covid 19 in China and the availability of handsets, but I could understand the problem) The courier company tried to contact me on 9 April, but due to bad MTN signal could not get hold of me and subsequently returned my handset to MTN. From there I have made several attempts to contact MTN to arrange delivery, but no one can find my handset. I have dealt with being transferred from one department to another, as well as *********** staff, and to top it all ****y staff that said that I am the reason why this is taking so long. Bottom line, It is 15 June, I am already paying for my new device, which I do not have, and nobody can tell me where it is.

I am truly frustrated and disgusted with the service I have been receiving from MTN.