MTN changed into a ****!

I have been a loyal customer since 2016. This year I upgraded my 40gig data plan which used to cover me for the whole month. I never ran out of data but recently I upgraded po 50g daily data which I used for a week then checked with consultant who told I'm still left with 48gig, however few days after that it then said I've run out of funds. I called mtn and spoke to a lady who told me it was an error they'll refresh it the next day. I called again next day, a guy refreshed but nothing changed, he then told me me that I wasn't allocated with daily data, just night data. Now Im unable to work. I'm waiting for them to call me back. I'm so disappointed with mtn. It has changed into Eskom😥