Excessive data charges call limit ignored

Received a bill for R4291 because R50 call limit didn't kick in. Call limit activated online. I agreed to some T&C's which I didn't get to read just to activate service. If you click on T&C's ,T&C's page doesn't open. You get directed to [URL Removed] Assuming I was accepting General T&C's which doesn't cover Voluntary call limits, I assumed all in order & I could have peace of mind that my kids won't run up excessive bills since soft lock will kick in when limit is reached & service will terminate. I was at work, unaware my daughter was downloading a game. For this reason I implemented call limits. When queried with Vodacom I was asked if I read T&C's. Confused I searched net & found T&C's at [URL Removed] different to above. If I was aware would have educated my kids & advised to consult me before downloads to ensure sufficient data & sent data. Had bill problem few months ago, mentioned to consultant was going to implement limits, consultant didn't caution me service is not guaranteed. Utterly disappointed with Vodacom & feel ill!