Months to feed back on a logged call, then two conflicting calls on one day within two hours????

My wife logged a call with Cell C months ago as she signed up for an Elevate contract for R 229.00. Then she was told that because Cell C had messed her around before, they were going to give her an extra 10 Gigs free. At the end of the month, my wife was charged R 299 for the 10 Gig (that she did not ask for in the first place). We logged a call with Cell C, they take months to come back to you. One phone call at 1pm, we were informed that they were going to credit my wife with the overcharged R 70.00 and adjust her rate going forward to R 229.00. Then, another phone call at 3pm, my wife was contacted and told that no, this was part of a deal that she allegedly chose. Before my wife could object, she was just summarily put through to the idiotic customer surveys they do at the end of the call!. Cell C has gone from bad to disgusting. At the end of our respective contracts, we are going to take our business elsewhere. Cell C - see nothing happen and you get ********** into the bargain.