Charged for Data and SMS

I notice on my unbilled calls that I am being charged for data and SMS usage , although the first 500MB/100 SMS should be part of my contract. I furthermore BUY additional pre-paid data every month (I currently have 4GB, but still getting charged on my contract for out of bundle usage) because I know how exorbitant the out of bundle data rates are. Please correct this immediately. Why do you charge so much for out of bundle data usage? Penalise customers for using more of your product?? Makes a LOT of sense. <br> <br> And your call centre is a joke. I held for 22 minutes on 20 April without being able to speak to a human or even being given the opportunity to leave a voice message. Then another 22 minutes to ask a simple question. Check my itemized bill if you don't believe this. I have been a customer since 1995, but this is becoming a bit too much!!!!