Lack of customer service

On the 30th mo June my data contract ended with Vodacom, i chose to continue with is because for the past 2 years i was able to use my 2 gig properly not go over the allocated amount. To my sad disappointment when i logged vodacom website to see what upgrade option i can take i was shocked to see that my account will be debited with R800 end of August. I found this very FRUSTRATING that now all of sudden my contract ended the bill goes so horribly up. What makes it sad is the fact that i was not told that once my data reached 2Gig it will continue charging, more sadly I've been a loyal customer of Vodacom for years now having had multiple contracts with them, no one from their accounts bothered to send me email or text to let me know that im now being charged out of bundle, they have my email address and other vodacom mobile as i have been with the for log time. This to me *******. Why this happens all of sudden once my contract has expired? <br> <br> Dear vodacom please note im one loyal customer who is dissapointed . I've been trying to get hold of your billing department with no luck. This is horrible. where will i take such money???i feel ****** as a customer