MTN sells products they cannot set up / don't know their own products

On 8 August 2020, I did an upgrade and got a new Samsung phone and the Samsung Esim watch. 4 months later and my watch is still not working, and I have been to 3 different MTN stores, 2 Samsung stores and no one can help me. When I phone the 135 number, no one can assist, and they hang up on me twice. This is very disappointing, and I am not getting and services from MTN. I am stuck with this expensive product, which I cannot use, because no one at MTN can assist me to do the setup. How is this possible they sell you a product but cannot assist with set up or even know the product they sell? Now I am stuck with a 36 months contract, and all I want to do now is cancel MTN and go to a different service provider because MTN is useless.