Fashion Express acc that isn't mine???

I have been receiving several calls and SMS from lawyers telling me I have a Fashion Express acc..that is over due of R4000.I closed my acc..over a year ago but I still keep receiving calls from lawyers tellinge about this acc..My name has been sent to Credit bureau because of this acc..and this really ****es me off.I have been to four of your stores but nothing is showing on their system.Please sort this matter out immediately or I will having to take things further regarding this matter.Fix your system please because this is really irritating me nowI don't have a Fashion Express acc..