An acc which I don't have with TFG

I have been receiving phone calls and SMS from Fashion Express regarding an acc that I have with TFG.I don't have any acc..with them I closed my acc I think last year but I'm still receiving this sms atleast twice a week.I have been to two of their stores to enquire about this matter and nothing is showing on their system when they enter my I'd no..but the sms had still not stopped.It is really upsetting to receive the sms when I know I don't have an acc.with them.Please can u solve this problem for me asap Nombulelo Nkomo ***