Woolworths seemingly don't know their own marketing/accounting systems!!

On NUMEROUS occasions I have been requesting both telephonically as well as via email that my ex husband's cellphone number be removed from my Woolworths retail account - everytime they tell me that his number has been removed and that they only have my mobile number on the system.... I am now at my wits end, becuase ONCE AGAIN my ex forwarded an sms stating my monthly installment owed to Woolworths - THIS IS UNACCEPTABLE!!!! AS WOOLWORTHS IS SHARING MY PRIVATE INFORMATION WITH A PERSON THAT HAS NOTHING TO DO WITH HIM!!! How many more times do I need to contact them to get this matter resolved - it seems they just tell me it is resolved so that they can get rid of me - PLEASE LET ME KNOW WHAT I CAN DO TO RESOLVE THIS MATTER!!!!