STOP CALLING ME!!!!!

I reported these disgusting excuses for a firm of attorneys in October 2014 and they stopped calling me. They are now harassing me constantly with SMS's that are becoming more and more threatening. The latest one I received today told me I have 48 hours to make a payment. They are NOT the attorneys of record in this matter and I have told them to appoint themselves if they wish to take the matter further. They have not done so. I am now reporting them to the Law Society as I have had enough of their bullying tactics.