Upgrade with 30GB free but no stock to send me

On 5 Jan 2016 I phoned MTN Direct and upgraded to a package offer of Two Samsung Galaxy J1 Ace phones for the price of R 159.00 per month. On the 8 Jan 2016 they only delivered One of the phones which i refused to take as this was not what i app**** for. It was sent back directly and up until today 17 Feb 2016 i have not received a single phone or had an email explaining what the progress was. I was told that they were out of stock and that they would be in contact with me. I received the 30GB data as promissed on my old Nokia Cellphone but could do nothing with it until it expired. Where is the advantage of getting the 30GB data free if i did not even receive a new phone. The best of all is i am now receiving the data and airtime minutes as per the upgrade but still don't have my upgrade phone and i am billed monthly for this. I want to cancel my contract with MTN that i have now had for many many years.