Mtn absorbs data and R60 in 5 min

Mtn SA absorbed my 1 gb data and my 60rand airtime in under 5 minutes and declared the matter to be resolved that I consumed and depleted from my end today. That the matter is thus resolved. I argued that that is not possible as the item I was downloaded was roughly 300mb size and nothing was updating on my device at the time of download.. I always stream and download videos on the Korean drama website almost daily if not weekly with midnight data. They are standing firm that the data was rightfully depleted and thus the airtime was consumed respectively. I dispute it because on the same day ( 7 July 2018) I had 1,7 gb worth of midnight data around 5am. I downloaded 4 episodes and when that depleted At 5:38 am I received a delayed message stating that my data is finished and I am using “out of bundle” internet. By then this has already absorbed my airtime which was 38 Rand . I let it go. I then purchased 70 Rand’s worth of airtime at 5:40 am . I purchased a 10 Rand midnight 1gb bundle to download my video 300mb size roughly. At 5:46 I decided to purchase a day Time data bundle as well while my video was downloading. It then said I had insufficient funds. I switched my phone off and switched it back on as they had advised priviously ( some **** about airtime being reserved so one was to switch the phone off then on for the proper reflection of balance). I switched my phone off and on 3 times and still my data and airtime was not reflecting. By 4:57 the video failed to download due to NETWORK FAILURE. At 5:59 I screen recorded checking my balance, . I called in at 6:12 complaining that my data and airtime vanished in under 10 min and the video wasn’t even a large video for it to consume 1 whole GB And 60rands !!! I explained to the lady that I didn’t even get a delayed message stating I’m using out of bundle internet within those 5 minuets. So literally if I hadn’t decided to purchase I would not have noticed that it depleted in 5 minutes. In short all the agents I spoke in a nutshell claimed that it’s a smartphone and background updates and nonsense like that. I told them my dear check my purchase history, it isn’t my first time using my iPhone to hotspot my pc, I have been doing this for over 3 yrs since iPhone 4, my background data is limited/ restricted. I’m not a fool. Besides I just downloaded 4 episodes and purchased data to continue with the 5th episodes which even failed to download but took data And airtime!!! In 5min ! I hate that I’m being undermined like some idiot . And their claim that it’s resolved on their end. How can it honestly be resolved when clearly something went terribly wrong. My iOS update doesn’t take place without me physically selecting the message in my settings so they can’t claim that . If Mtn SA thinks this fine , then they are *****ing people who are honest loyal customers. All I know is this is NOT normal and them saying it is when I have proof it isn’t, is very wrong