Bad customer service

I went to tour store to query an amount outstanding that was sent to me via sms and the lady told me it was some magazine club that I never agreed or even received since i have this account I no longer buy at ackermans and thats why i thought it was strange to have a balance to pay. Even after logging a complaint and asking to cancel the account i still get the sms saying that i will get black listed if not paid as soon as possible. Can someone please do their job for once amd assist me with this matter. This is exactly why i will never ever sign for accounts again you get billed for things you never receive or agreed to bunch of *****s thats what it is