Vodacom retention's dept are full of empty promises

I called them to cancel my contracts because their data costs are ridiculous, was offered a deal and decided to stay, its been 2 WEEKS! I have spoken to about 7 agents ( I have to keep on calling them) no one gets back too me!!!! I'm beyond appalled by the level of customer service as I have been with Vodacom for over 9 years! I have asked to speak to a team leader/manager and always get told they are in a meeting (no surprise) ! I should have stuck to my guns and cancelled ALL business with them! Is it too much to ask to be given a courtesy call to advise on the progress of my application?????????