Horrible Vodacom

A while back, I took out a contract with them, and ever since, they've been sending me other people's invoices. If your email address has mashiloane in it, chances are, Vodacom has sent me your invoice. Which by the way, has client confidential info in it. I reported this over a year ago, but since they have no way of validating client email addresses, they are giving me excuses. They have no way of going through all their client info and removing my email address from those profiles, so instead I will have to forward each email I receive so that they can try to remove my email address from those profiles. This is **** of Vodacom. I receive loads of emails from Vodacom, with other people's invoices. How hard can it be to just remove a single email address. I am sick and tired of them telling me they are investigating.