MTN service sucks

I upgraded my contract to a contract with handset, They phoned me a week later and assured me all was in order and delivery of the handset was still on track. Now when i follow up I am told i did not opt for a handset with my contract and therefore it seems the upgrade was done incorrectly to something I do NOT want. I have tried taking this up with Customer Care and are just told that it's done already and can't be undone. As per my previous conversations, i reminded MTN that i record my conversations and therefore can also prove that what we discussed for an upgrade is NOT what was implemented. They simply do not care. How can this be. I must pay for something i don't want for 2 years?!?!?!?!?!?