False info on Upgrade

On Monday 21 December I did an upgrade on my data line and migrated from a 2GB per month package to a 5GB per month package. When I did the upgrade, I asked the lady if I would be getting the 5GB night owl data too, as advertised in the December leaflet. She responded positively by saying that I would indeed get it. I then went on holiday and returned on Sunday and when I checked my data balance I saw that I do not have any night owl data. I then phoned the 114 customer services who then told me that night owl data was not active on my account and that I would need to go to the store where I upgraded. This is unacceptable to me. I was given false information when I upgraded and I expect to receive what I was told. Please sort this out ASAP.