Thanks. The missing December figure is strange. MTN's billing systems are a mess by the looks of it.I cant seem to find that transaction history page that you showed.
But I went throught the invoice pages and a previous bill overview and it for Dec 2019 nothing shows
Dec is just missing. If I filter to Dec only it says no data available
The only thing I see different that happened in Dec 2019 is that the "Promo service fee" fell away
I used https://mycontract.mtn.co.za/ and then the "View my statements icon" on the top left to get to this summary.