Nedbank spam

I get regular SMSs from Nedbank telling me I've withdrawn X cash here, or deposited X amount of money there, leaving me with X left in my account. I'll be clear: I do NOT have a Nedbank account and should NOT be getting second-by-second updates of some random person's financial relationship with Nedbank. I tried speaking to someone at Nedbank once, but they were no help, pretty much telling me I'd just have to deal with the incessant messages for the rest of my life. I want my number off your records. If such a big firm can't take care of something so simple, I don't see why anyone would trust you guys with their money.<br> <br> I have the last 4 digits of the Nedbank account number and card number ready, if that will help. I even know how much money is in their account.