Unresolved dispute since 2012

From november 2012 -2013 I logged dispute which ran into november 2013.When it was time to upgrade in 2012 the call cntr offered a Tab7which I told them I will confirm the next day,they went ahead without me confirming and kept billing me more than I payed previously,I did not make any calls in that yr and my service was continually disrupted and switched off for nonpayment while debit order was been deducted eventually in november 2013 the retentions department contacted me and offered 2 months free full Subscription + handset for the inconvenience on an any phone. I negotiated a deal for 3 months free full subscrpt+ handset on a Samsung S4 which took them 3 days to confirm.The person with whom i dealt with said my first pymt will only be deducted from march 2014 ,I saw pymts been deducted from December 13 and was told it will start in january 14 which never happened and i was at square one once again writing lots of emails and also told that the person i liaised with no longer works there which was not true as I traced her as I had her cell number, after long while they said they will pay back R300 as a gratuity for my trouble I am not satisfied as they owe me R1147 .