Disappointed AGAIN

I really give up with Vodacom last week I spoke to a lady at cancellations to end some of my contracts, she however convinces me to renew them with a big discount and a shop voucher (which I did not receive) because I am a good customer for 21 YEARS. I even recommend her to a friend. Today I find out that all is not what we discussed and try to call her that is now NICOLENE AT CANCELLATIONS. So, the lady that answer today ask her surname witch I don't know, and she told me there is 100s of Nicolene's working in cancellations dep. So, it looks like the only way to get hold of anyone there is to report here maybe the right Nicolene read this otherwise I will try Facebook.