Poor service and very bad client relations

I was hounded by an agent daily wanting to sign me up as my 2 year contract was about to expire, I finally opted for a Vodacom Tab + 500MB data all for R49. I asked the agent I needed 2 deals she was helpful yes, I'll get my colleague to phone you back his just on lunch (still waiting 2 weeks later) Waited for the new month, put the sim in and surprise only R39 airtime on the card and no data then I'm told I'm on a R60 contract which I didn't agree to on top I get an SMS advising i'm going to be debited R300 month end. Now i have to waste my time and phone them only to hear it takes up to 14 days to sort out, why so damn long when it took 5 mins to sign me up. I visited a branch to be told its not their problem, I must phone in, Vodacom is Vodacom same brand but when it comes to problems no one is responsible, still waiting on callback - very pathetic for such a huge business.