Bad Attitude by call center staff

I have been receiving sms's for overdue accounts that are not for meant for me. I contacted the call center and advised them accordingly. I provided my cell phone number and requested my number be removed for the person they are trying to get hold of . I was assured that it would be done . I received further sms's in the new year , all that do not pertain to any of my accounts . I contacted them again , this morning . The lady that I spoke to was extremely rude to me when I questioned why I was still receiving these sms's . This practice is clearly in contravention of the POPI Act . If this does not stop immediately , I will be logging a formal complain for the contravention of the POPI Act as other customers account details are being sent to me via sms's