HARASSING SMS'S FROM NORTON ATTORNEYS

Once again I received a sms threatening me with legal action. I am paying my account. Everytime my payment reflects on my Standard Bank account I receive an sms thanking me for the payment. Now once again Norton Attorneys are sending me sms's stating legal action will be taken because no positive arrangements have been made. I am not satiesfied with this company's attitude. Standard Bank are satisfied with my payments. I don't know what to do regarding this sms's. I must pay for the sms's receiving from this company. How many times must I complain about this company's attitude towards me. I AM PAYING MY STANDARD BANK CREDIT CARD!