Standard Bank and Bham and Dahya Attorneys ****

I have received multiple SMSs about payment I need to make for a Standard Bank credit card account that I have never had . I have never did any banking with Standard Bank. Now they are sending me threatening messages to me to immediately pay the unknown amount to prevent further legal action . Their REF is STA94A/***. This can not be legal, but a ****. Please can someone take action on this?