MTN is not a bozza network is a Mabena Network

I have a data contract on the 26th April I loaded R100 airtime hoping to convert it to data. Immediately after loading I tried to convert and the APP advised that I had inefficient funds I I check my airtime and it showed that I had R50 available. I was desperate for data because I wanted to work. I then loaded R150 and tried to convert again. Received same message inefficient funds. I checked my funds I had R60 available. Send them an email and they never responded. Few days later send them another email and they send me an email to authenticate myself. Send the all details they needed and they didn't respond. On the 5th of May I loaded R200 airtime and I suffered thr same fate. It showed that I had R60 airtime again. Send them another email and they said I must authenticate myself. I send them all details and nothing happened. Borrowed my wife's phone to called them and they transferred me to the contract department: 1st call was cut off, 2nd call agent could transfer me, 3rd agent after explaining my story pretended she couldn't hear me anymore, 4th call agent had system issues, 5th agent also had system issues, 6th agent advise that he will log a call fault for me. More then 24hr later inhave no feedback from MTN. I sent them another email and still no feedback.