Telkom spend limit is a *******

I'm disappointed with Telkom to spend limit. I don't understand why they put R1500 spend limit for customers automatically. This is not far, was not aware that my account is busy taking data and mins from the so-called spend limit. now I'm owing R1000. plus installment. This is a robbing game, they let you spend and notify you when is about to finish. they need to stop including the speed limit without our knowledge or don't include it at all, it has to be us a customer . I have been a loyal customer since 2012, but this a not far. maybe they should have notified me before it reached R1000. they put this limit for you automatically and expect to call them so that it can be close, why don't they ask when we take the contract if we want spend limit included. I'm not even sure if I really used R1000.