LTE data not allocated fairly

I am a Telkom mobile post-paid and pre-paid client. There are a few things I would like to have cleared up.

Yesterday (Saturday 24th February 2018) I purchased a 1 GB Weekend package add-on for my LTE account. I have the 20 GB anytime/ 20 GB Night Surfer package and had run out of anytime data. I got the 1 GB data and was able to connect to the internet again. I still have quite a bit of Night Surfer data available. After midnight, my account did NOT start using the Night Surfer data, it continued using the weekend anytime data and finished it (before 7 am). How is this fair? Today I am again without data and have to connect with another device. If this is hidden somewhere in the T's and C's I think it's disgraceful, it's not much cheaper than the standard 1 GB top up.

This brings me to my second point, also regarding the 20/20 deal. Near the end of January this year I also ran out of anytime data. I used the option to top up with an extra bundle (reasonably priced but my no means cheap). The bundle lasts for one month from date of purchase and does not roll over. The problem came in when the new month's data kicked in. The contracted data was the first to be used, the additional data I purchased was untouched. Basically one has to use your allocated data first before you can use the additional data you purchased. My allocated data ran out AFTER the expiry date of the add-on bundle, effectively wasting over 5 GB anytime data and 20 GB Night Surfer data.

I don't see how this can be deemed moral or fair (T & C's aside).

I have introduced a lot of people to Telkom over the past few years, mostly due to the pricing and the fact that as an I.T. manager, people trust my recommendations.

I am not a totally unhappy Telkom customer but I am very happy about the usage of data, hence my complaint.