When can one use the MTV BozzaGigs Night Data work?

My complain is about the MTN BozzaGigs Night Data. I purchased the Bozzagigs data bundle special for R150 sometime in the month of March 2022. It offered 20gigs shared between anytime data and night data. I used the anytime data as Hotspot so that I could work as my service provider Telkom service is poor in the Kruger national park. I made use of the anytime data till it was depleted. I have now encountered a problem as am unable to use my night data. MTN network is asking me to sign in and buy more data in order to access their services.

I would like to know when is the night data supposed to be utilised, as i was trying to use it during the hours of 3am and 5am and thats when i encountered this issue.

My MTN number in question is ***.