not keep promise

I logged a complaint with hello peter on Tuesday 22 December 2015 regarding upgrading my contract with Vodacom. A guy named Yussof called me Tuesday afternoon to help with the problem. He promised to sort the situation and call me back which he did the next day as they did not have the requested hand set available. He said the best is to cancel the upgrade, do a new one and decide on a new device which we did. He was suppose to call me back on Wednesday to confirm the delivery address for Thursday or Monday. Until now I did not hear anything from him or anyone at Vodacom. I called the call centre this morning, which is totally *********** by the way, and according to them I qualify for an upgrade which means the previous upgrade was cancelled, but no new one was processed. they cant see any notes on their system otherwise the agent I spoke to would be able to see what was going on with my case and help or referred me to the correct person but they sent me from pillar to post and then cut me off. I honestly don't know what to do any more at this stage I just want to cancel the contract. I really am sick and tired of that place!