Data disappears

Good day,<br> I bought an internet ****le from Afrihost on the 27.11.2015 hoping to save some data with the device. I have a contract over 6GB per month. I normally don't use more than 3 GB with my phone in a month, so I was thinking I am going all out with 6GB. But no, the data just disappeared from day 1. I was in contact with the call centre almost on a daily basis, who told me to download apps to monitor the usage. But even though I got those apps, the data disappeared and no one was able to help me. Since I received the ****le I used 9.5 GB, so I had to top up the data on numberous occasions. I called now again the center cause since the 19.12. I have apparently used 1.5 GB. This is impossible, cause I didnt use the ****le. I was on the phone with the call center again 60min today &the lady was not friendly at all. She said she will take it up with MTN and let me know. We went through the data usage sheet again, and there have been big donwloads again, that I know I did not do, because I disabled all the auto-updates etc that I was adivsed to do before by Afrihost. So, I would like to get the data back (or refund) &explanation where the data is & return device. Thanks, mareike