******* marketing practices

I've been getting spam texts daily from Vodacom with the identical text. They have no opt out option in the texts themselves, as they're required to give by law. I'm on the do not call register, so they're breaking two laws with this one. I contacted Vodacom to get them to stop spamming me. I've spent three days with the sales person trying to get myself removed from that list, and I still have had no joy. This should not be this hard. I didn't sign up for spam, therefore I should be able to opt out easily.