TRUWORTHS NON EXISTING CREDIT CONTROL

How bad is Truworths credit control? I am getting every day a sms from Truworths for outstanding amount that is overdue, but this is not me with the outstanding amount, but Mmamotsana that use my cellphone nr when she opened the Truworths account. Don't they check the number or any details before they open an account. I have phoned them numerous times that they must take my number off as this message don't reach Mmamotsana, but their reason is then they don't have a contact number. BUT IT IS NOT HER NUMBER!!! Further Truworths is still sending Mmamotsana sms of sales they have, to probably let her going deeper in overdue on her account. Luckily SHE IS NOT GETTING THIS SMS EITHER, as I am getting this too!!! I am blocking the whole time the numbers, but it seems then they just getting another number.