Worse service provider ever

I do not understand how a capped contract at R500.00 has a cell phone bill of R2078.03<br> Mtn used to the best at what they do but at the moment they are the worst service provider. <br> <br> I would really appreciate it if someone could just come back to me on this, I feel it is unfair that I am being billing this kind of accounts when I have a CAPPED contract. There service of MTN has really gone to the dogs I cannot believe that people are still taking out MTN contracts if only they knew what they are getting themselves into <br> <br>