Fnb private banking terrible and unprofessional

I was a private banker from 2013 to 2016 as l was earning very well. In 2917 I lost my job and asked fnb to close the account. 2 years later i get a call from fnb attorneys stating I am owing R10000 in fees I refused to pay.this year I get call stating that I am owing R17000 in fees. Nobody wants to listen... I will be going to the banking ombudsman. As a private banker I should have got a call within 6 months when there was no transaction on the action. Or they should have closed the account like other banks. If there was a lower score I will give that ad they dint deserve even a 1