*****ulant delivery of device

On september 17 i received a phonecall from CCI in durban about my cellphone upgrade that was due. I got a good deal from them and they informed me that i will get a samsung galaxy j5 prime within the next 7 to 14 working days via courier. On september 28 i phoned them with my reference number to querie about my delivery and the lady informed me that the delivery would be made in the next week. On october 8 i phoned again to querie about the delivery because it was late and the gentleman told me that the delivery was made on september 28....the same day i initially phoned. The delivery was not made to the adress that i gave them and it was like nobody believed me that i never took delivery of my device. I tried to resolve this at the mtn store in mall at carnival where the gentleman told me that it was my fault because i did the upgrade over the phone and he could not help me because he did not believe that it was mtn that phoned me. After i threatened with non payment i eventually received a phonecall from cci on october 22. I had to mail a copy of my id so they could start their investigation which would last between 7 and 21 working days. On novemver 14 i received a call from mtn ***** department and the gentleman informed me that someone else took delivery of my phone and presented a copy of my id together with an Ackermans account as proof of adress. I dont have an ackermans account by the way. On top of that i am being billed 800 rand every month for i dont know what divice the people took. When i declined to pay the money, my account was suspended and i could make no calls. Never have i been treated this badly by any company and i am deeply disappointed. It has been two months since the upgrade and i am stil using my old(broken) device. I have run out of options now as their " investigation" is standing today on workday number 22. Please help me......anybody?