Disgusted!

I was contacted several times via SMS by Brooks and Luyt regarding payment on an account that I do not even have. The account was actually in the name of my partner's cousin, who is no way related to me. Further, my details were not provided on this account. The last SMS sent to me threatened to take further action against me unless a payment arrangement was not made with them. My question is firstly how did they get my details and why did they send out SMSs to me regarding an account that is not even in my name! I am truly disgusted at the way in which this law firm carries out its activities.