MTN ***** Department

My account was access on the 12th of April and my limit was changed from R0.00 to R16000.00 and the amount of R15999.99 worth of data was bought. However, the data is still sitting in my phone. I have opened a ***** case, did an affidavit - but up to today nobody from MTN have phoned me. I have not received any feedback. I am sitting with a bill of R16000.00 and data on my SIM card that needs to go back to MTN but nobody wants to help. What MTN? Please explain to me how it is possible that my personal information was leaked and how can a person access your system and phone me with all my details