stop sending me sms's

i am constantly bombarded with sms's from 0877486797 wrt buying exam packs for R450!<br> i tried calling but the people on the otherside are pathetic!!!! i sent an email but no repsonse!<br> <br> emailaddress: [Email Removed]<br> tel no's: 012 7704001 & 012 770 4239<br> <br> sms sent from no 0877486797