Poor Service from Vodacom Staff, Urgent Training needed.

Poor service from Vodacom. I called last month to add minutes and data for 24 months on my contract and they only added it for one month. I called this morning they now tell me that they unable to give me the 90% discount for minutes and data like I have on my other line. This is the reason I didn't upgrade and this is the reason I would rather cancel. I'm unable to make calls to my clients or send SMS because of an agent unable to comprehend my request. I'm disappointed as I've been a proud longstanding customer of the Vodacom brand and today as a valued client I can say I'm frustrated and disappointed.