Vodacom once off data bundle unannounced changes

I have a vodacom contract and usually purchase once off bundles. A few months ago I started buying 5Gb once off bundles which together with the night owl data lasts me 2 months.

I purchased a 5Gb once off data bundle on the 3rd of May. I never received any night owl data and noticed the normal 5Gb data is only valid for 30 days.

I called in to vodacom customer care and was told the night owl is only valid for month to month bundles.

Anyone have any news on this?