Data and airtime ******* with bad service from the call centre to match

I used my phone around 15:30pm on the 10th Dec as I wanted to download an episode of a program I was watching,my battery was low so before it died I logged off the internet(I had 1.8gig data left)+(R240 airtime) and put the phone off to charge it.When I switched it on around 23:45pm I had R0.00 airtime and 0 mb of data.So I called 808 spoke to Lethu,everything was polite until I advised that my data disappeared and to top that off R240 airtime is also gone even though my phone was off and I need to have a query logged to ascertain why so much airtime and data could be used up in a short time without downloading anything.He advised that he cant log a query and if I want to have it escalated or to speak to a manager-I would have to call today.With that said I became very upset because Mtn customer service consultants dont try to help-they pass the buck and still have an attitude to match.I have 4 lines with a recent upgrade which I was skeptical about,the free 30gig seems to be a gimic because the data just disappears but now my airtime aswell-that it just crazy.I want a refund-or we need to look at cancelling the upgraded line.