MDB Attorneys are saying am in arrears with FNB account ***, which is a lie

I have previously brought this to your attention about MBD Attorneys who are sending me threatening sms about FNB account ***, which they say it is in arrears. I have received another sms this morning under the aforesaid account number, again threatening me to pay. Please attend to this as I don't have any such account. I also phoned your attorneys MBD Attorneys to remove mu number but clearly they have business with you, please attend to this