ANOTHER UNHAPPY customer

I was called by the Vodacom call centre March 2014 offering me what promised to be a fantastic deal and package as my upgrade for much less than I was paying at the time, provided I kept my 2 year old iPhone. I agreed to the upgrade since it all sounded great only to be extremely disappointed once the whole deal kicked in. They gave me 2 weeks in which to change the contract if I wasn't happy but for the first 2 weeks everything was hunky dory. As soon as the 2 weeks was up I ran out of data, and also realised that I was unable to send mms or any premium rate sms's. On going to one of the branches I was told there was nothing they could do as the 2 weeks had lapsed and I ended up having to pay an extra monthly amount for data. I have also consequently had other calls from the call centres to whom I have voiced my complaints as well as going online to voice my complaints. Absolutely nothing has come of all the promises that someone senior would get back to me. My iPhone battery has been giving problems for quite some months now and I have to carry a charger around with me all the time as the phone has to be charged constantly BUT I'm BOUND by this SERIOUSLY UNSATTISFACTORY C