Direct Marketing

I was contacted by Leeroy from MarketSA on behalf of Standard Bank. This was on 17 July 2018. I told him that I have opted out and that he should not be contacting me for any direct marketing. He referred my complaint to Easylife Mulibana at Standard bank. I explained that I have the right to know how they obtained my personal information after I had opted out. Mr Mulibana has failed to give me satisfactory feedback. This after several Emails. I would like Standard bank to investigate this problem and give me the feedback I have been waiting for for more than a month. I was contacted in connection with using a Standard bank product. If this is the level of service they offer their clients, then I am glad I did not take them up on the offer. I want to understand how they obtained my personal information and why the are still using it when I opted out more than two years back.