I was promised free data monthly

I am so angry it's not even funny. when I called Vodacom to cancel my existing contract I was convinced by the retension department that I should stay on board the Vodacom family. The lady who did my upgrade promised me free data every month. I have called the call centre and nobody knows what's going on. they then cancelled my promotional data bundle and said there is no proof. if you listen to the call recording I'm sure you will find your proof. this is not the first time a issue like this has arisen.I then spoke to the retentions manager to confirm all that I was promised on my upgrade regarding the data bundle. I can believe that Vodacom is so *********** on such a small matter. I will post my anger on social media as well as make it noted to how **** Vodacom is. I don't have time to waste calling centres going back and forth. Im a customer and a paying one not some floor mat to be tramped on. sort this out or I will take it further don't let I become a share holder because of small data issue