Vodacom call centres - a waste of money

I upgraded via retentions dept on 27 Jan 2015. I dealt with Lydia. Part of my new deal was that I would get an additional 500MB data every month for 24 months. I received the new phone on Thur 29 Jan 2015 but to date NO DATA. I have since called the call centre about 10 times. Some say hold on & some just cut you off completely. this morning I spoke with Yusuf who promised that he had sorted the issue out & my data would reflect by end of business today, NOTHING!! It's called over-promise & under-deliver, something Vodacom is becoming increasingly known for. I just spent 1 hour JUST trying to speak to a manager & to no avail. Phiwe didn't even tell me to hold on, he just cut me off immediately. He is not suitable for his position & should be fired for his behavior. If Vodacom cannot service me, please feel free to terminate all 3 my contracts!!! I demand a full refund for the airtime we had to convert into data & for my time spent on your insufficient call centres.