Stop sending me sms's stating I have not paid my account

<p>Dear Customer, we have noticed that your Telkom Mobile account is overdue, which is due to non-payment or a payment being declined by your bank. Kindly make a payment within 48 hours to prevent the interruption of your service. Please call our call centre on 081 180 and quote reference ********** 74 with payment details. Why are you sending me these sms's when you deduct my payment via debit order from my account. I cannot put up with this incompetance. i run a business and cannot afford to have a bad credit scoring. This needs to stop immediately.</p>