Out of Bundle Courtesy Notifications

I am absolutely disgusted with your customer service and the way i have just been handled. I spend on average R1500 rand a month with you and this month i have been billed R2300. This i have absolutely no problem with, the connection is good the service is generally good and i have absolutely no problem paying my bill on time every month and will continue to do so. I went out of rates and yes that is my fault i do it every month for my business and again i have absolutely no problem paying for what i used. My problem comes that i did not receive and have never received a SMS saying i have gone out of voice minutes, data yes i have received and thats fine its up to me to top up, that is fine. But i am absolutely appalled at the fact that it seems like good business practise to you and your company to allow paying loyal customers to continue to spend out of data rates without notification for voice and then when it is done consistently not having a sales consultant or customer service courtesy call advising that it has been a consistent issue and perhaps me as a customer should look to upgrade. Contact me immediately with advice or i will cancel my contract early next week.