Cant close bank account due to poor service from banker

Standard bank is the worst bank I ever had to deal with. I would not recommend this bank at all. I am still trying to close an account as I have moved to a much better one that actually gives good service. Standard bank has *********** bankers that don't bother to read or respond to their emails and promises bankers to you but they don't service their clients. I am still trying to close a prestige bank account which I paid all outstanding monies to overdraft was clear almost 2 months ago. The day my account was zero I requested my assigned banker to close this account and he was not even responding to my email request. A week after that I went into a branch to see why this account has accrued fees and to close this account as I have requested a week prior to this which accrued nothing at that time. a week and still my banker never actioned my request. the enquiries clerk emailed him and asked him to reverse this as I did request the closure a week before. He never even bothered to reply to her email only after I rep**** to her email thanking her for trying to assist me he emails us 2 days later stating that I am liable for the fees. I then escalated this via their WeChat and asked this to be resolved. A few days later the fees was reversed. And of course I asked the banker on We Chat to close this account which he now escalated to my banker again. then this banker decides to reverse the reversal because he feels I am liable for his mistake and now questioning the consultants that reversed my fees which is now double what it was (because this was now delayed again). The branch is now refusing to assist and is stating I am liable for fees on this account I was trying to close almost 2 months ago. My question to them was why am I liable for fees that accrued when my account was zero and if my banker actioned my request when he was supposed to I would not be in this predicament where I am now seeking legal advice for a mistake from an *********** banker. My thinking is that my banker did this on purpose to delay my closure of account in order for fees to accumulate. Been with Standard Bank since I was a teen and out of loyalty stayed with this bank will definitely not recommend such poor service to anyone. Just because I am not a private banking candidate (well at that time) does not mean I have to get this type of service. Very sad that I am treated this poorly.