ACCOUNT SECURITY? WHAT A JOKE!

I tried to change my cell number via secure message, but was told that I need to go to a branch as SB needs to see me in person to update phone numbers. I was heading abroad (long term), but made the effort to go see them a few hours before leaving (on Friday 10/04/2015) I was assured my details were changed on my profile. My mastercard is linked to my current account and I assumed it was all sorted out. I gave my sim card to my nephew and received a message to my new number from SB, stating that details have been amended. On 17 April 2015 my nephew forwarded me a message he received from SBSA Mastercard, detailing my credit card limit, outstanding balance, APR and minimum payment due! I was furious!!! I phoned MC (from England) and they could not care less about my dilemma! They even kept asking me to come to a branch, despite being told I was abroad. SBSA should be more worried about their *********** staff as far as ***** prevention is concerned! I've sent another secure message to ask that the old number be deleted, but it won't surprise me if they ask me to come into a branch again!