KGB Attorneys - not checking they have correct debtor details

I keep getting a sms from KGB attorneys about Capitec Bank Debt - i only have a savings account with Capitec and nothing else. I tried calling them and the consultant said someone must have given my number as contact. I said they need to take it off as this is not for me and he said they cannot. that is unacceptable. I dont have any debt with Capitec bank and I do not want not unsolicited sms and phone calls from KGB attorneys. The reference i keep getting is CBFC*** in case they bother to read this so they can fix this issue.