FNB business account 2 month frozen account and poor service

I do business banking with FNB bcz everyone with business experience recommended them but after my latest incident regarding client that lead to freezing my account indefinitely the service I recieved to help deal with it is nom existent. firstly the case was a refund dispute where I aptly refunded them and out of spite it seems they still files a ***** case. after spending close to 5 hours at the bank (4 hours on ***** line) it was more like putting pieces to a puzzle than actually received help since all 4/5 call agents gave different and new information. the actual bank couldn't help me too. Once I finally got the correct email of my case agent I still needed to wait for an initial response response from them. this was supposed to be a quick dispute like I have all the proof of me sending the money to client and screenshots of them acknowledging it but still it's been over a month with my account frozen and me constantly sending emails to the agent who doesn't seemed bothered to send me anything back besides automatic messages. after a month I phone fruadline again and come to find out this agent has been on holiday and moved my case to a different agent. I am livid because how is that the standard procedure to these things. the least u could do is email me and let me know the other agent taking my case but yet again it seems standard practice for FNB to not give there business clients heads up to important matters like this as they did every step of the way so far not communicating and holding my money up for some petty customer who blindsided me in bad faith which ultimately made me let down other customers and FNB not looking out for there own customers.