Why is MTN SPAMMING US

Why does MTN feel obligated to send us ******* we did not ask for. Each time I recharge, I receive 5 to 6 sms'. I read several complains on HelloPeter urging MTN to stop spamming, and all they can say is \Send STOP to 34471/34472\". It is a disgusting behavior and lack of consideration for customers. If I want to see your promotion, I will go onto your website. Stop sending me sms' and rather improve your ****py service. Give me what I pay you for and stop harassing me. Remove me from this pathetic sms notification database and don't tell me to dial any 344* numbers because you obviously ignore it. You are not rendering the services you should be rendering but rather focusing your attention on harassing defenseless customers. STOP WITH THE SMS'"