Problems with Loyalty data on My MTN App

I bought 2 GB on My MTN for 3 500 points. As it arrived on my account it appeared that this data would only be valid for 1 hour! I then bought another 2 GB, this time for 5 250 points and when that arrived it was only valid for 1 day. There is no indication of the validity of the data purchased on the My MTN app. There is a set of conditions attached, but these say nothing about validity.

I feel cheated out of nearly 9 000 points, the data equivalent thereof I could not use. These loyalty points appear to be entirely useless, not worth keeping a record of them even.