Fourth time I've been billed incorrectly!

This is the fourth time that Vodacom has incorrectly billed me with an account for THOUSANDS of rands worth of data usage! Last month they billed me a ridiculous R3500, and in the past I have received accounts of up to R6500!! <br> <br> And they know it is a mistake on their side, because they have made accounts adjustments to correct the ridiculous billing in the past!<br> In the meantime however, they simply soft-lock my cellphone! Rendering my data useless (which i purchase on their App).<br> I have NO issue buying data! I purchase GIGs and GIGs of data on a monthly basis via the Application! I have NO reason to go out-of-bundle! I watch loads of YouTube, so it's understandable that I will use a lot of data! Hence, I PURCHASE it!<br> I am starting to believe that this issue lies with Vodacoms APP!<br> <br> I am simply going to cancel my Vodacom contract, and the 4 contracts of my other family members. And Vodacom will NEVERsee me again. I have had a Vodacom number for YEARS, and am a high-paying<br> customer, even WITHOUT Vodacoms errors!!<br> <br> This is simply ******** of them, and I will NOT tolerate it!