My funds are withheld for 3 years.

I would like to express my utter disappointment in FNB. On the 24th of December 2019 my funds were held back in my business account. This is the first case number , *** DOYISA YOLISWA was handling the case and had I had contacted her from the Southgate FNB branch where she had confirmed she only needed the proof of purchase for the vehicle I had sold to release the funds, I forwarded that and the buyer also forwarded the email confirmation of the purchase and I was told the funds would be released in the next 10 minutes, to my surprise, another call was received and I was advised that they will no longer release the funds. To date I have not received my money back nor has the account been unfrozen. What am I do do to resolve this? The most painful and disturbing event was last year around June when my business and personal account was frozen totally with not much information as to what the reason for this was, I tried my best to contact the bank and go to the Southgate and The Glen branch with no luck. Here with the case number *** THABO LEBEPE, he held both accounts and the more I tried to contact him this was not fruitful. I am asking for an explanation on why these accounts are held, why are my funds not being released after 3 years? I need an explanation and resolution to this FNB. I am very discouraged and disappointed in this bank that I had trusted for years. Fatai Moshood S****i. ***/ *** are my contact details.