MTN's Rude Awakening

MTN must really be desperate to advertise because this morning at 04H53 and again at 05h23, I received smss from MTN Rewards, urging me to recharge. I try to sleep at night but with MTN's constant smss, it is becoming increasingly difficult. These smss have been going on forever. I really do not appreciate being woken up by a stupid message, especially it being an advert. Why cant MTN be like Vodacom for example and don't send adverts at night? Are they that desperate? If this sh*t does not stop, I will CERTAINLY take it further!