MTN *****s your airtime money

My laptop gave me an error message on 26/07/2015 :- you are out of data and airtime. I then loaded 1 GB data via EeziRecharge. I then got an error message that I have to load airtime in order to access the Internet on my computer. So I loaded R 200 airtime. Within 5 minutes the airtime was gone and I got another error message: load airtime. So I loaded R 100 airtime and within 5 minutes this was also gone. But I still had data. I have logged complaint *** and *** with MTN. But to date this problem has not been resolved and I am losing business because I cannot get onto the Internet with my computer. I have tried your call Centre 808 but still no resolution.