Unwanted Rewards partner sms messages

Well done ABSA you have in the space of three months managed to annoy me for a third time. You have now decided to send spam sms messages to my cell phone thanking me for shopping with my ABSA card at one of your Rewards partners and offering me a R50 meal voucher at a popular food chain. I did not consent to being added to this mailing list and I do not appreciate being added to it. As a consequence of your unwanted spam sms messages I will, from today, never ever spend any money in said food chain. Nor will I ever use any of these R50 vouchers. This is the second unwanted spam sms message I have received offering me this voucher. I require ABSA to immediately remove me from this mailing list and all other mailing lists ABSA has unilaterally decided to add me to.