I don't trust Standard Bank.

Today I've done a credit check just to check where I'm at only to discover that I've still got my loan account that I have settled in 2017 staring at me,, I then went ahead to contact Standard Bank only to discover that they've never closed my revolving loan account after I've put an emphasis on the fact that I want it completely closed and I signed an acknowledgement of the account being closed. I now owe my bank money which I had no clue of, Its been 2 years and if I hadn't done my credit report I never would have known. When I contact the general call centre number as they do not have a direct contact number to the Rondebosch Cape Town Branch they told me that I have to go into the bank to resolve this, so I need to take time out to go have this sorted, Surely they can get a signed copy of acknowledgemeny of account being closed from the Rondebosch Branch? I'm think of banking elsewhere anyways, Standard bank u have dissappointed me!!!