MTN 2g data lost in 2 hours

On Friday19 June I bought 500mb and it was finished in a few minutes I also had R15 airtime which just dissappered . I could not understand that but then Monday I was supposed to get my contract 300mb plus free 165mb but I did not receive it. I phoned MTN to report I only got a ref no. Thursday I bought the monthly 1Gig and got 1Gig free. The two gig was finished in 2 hours. I phoned again I was told that I had some apps running which I disputed as I had switched off mobile data but data was still being finished. I am really mad and furius with the data that goes missing with no explanation and I want my data back because even if mobile data is off still it goes missing. Can MTN explain this to me and if there is no explanation and I do not get my data back with an official apology I am porting to another network. I am GATVOL!! The frustration is that if I put both airtime and data it just goes missing without me using it. I would prefere somebody calling me. The 2gig always lasts me a month andhalf not 2hours Never I refuse you can even check my record. MAD as HELL