Keep harasiing me

I keep getting calls from Vodacom about data packages.<br> <br> Now Vodacom has shown me they are incapable of keeping track of data usage in the past. I lost 3 GB once and I only used that device once that month for about 10 for internet banking! When queried it, I simply get a response that it is correct, yet they cannot supply proof of usage!<br> <br> That is why I am phasing out Vodacom for any data related use, and going with ADSL!<br> <br> So Vodacom stop harassing me with your consistent calls about data, rather learn how to accurately measure data usage and charge a better price. Only then will I even consider yo again.