FNB Charging me fees while my account is frozen

I used to brag to my friends that FNB is best bank in the world little did i know that my life will be hell because of fnb. It has been 6 months since fnb froze my account because they say someone paid me with ********** money, as much as i know that in the world we live in we have people who prey on others as soon as fnb told me that i sent them ID documents and bankstatements which i had asked from my customer whom i sold my products to as part of KYC, they said they will investigate and came back to tell me that the documents which were i was sent they were **********ly taken away from the owner, they expected me to know that. Anyway being me i told them the platform which manages the sell/buy of our products is asking me for proof from the bank that they froze my account because of the transactions from the buyer whom they say is a *********, the bank said they wont do that, all they want is for me to pay back over R180k which was paid to my account. Anyway to cut the long story short i told the bank i do not have the money cause they can see its not in my account i bought the products from other suppliers and those products are with the buyer soo we have to work together to track the buyer they said there is nothing they can do, fair enough i am a private wealth client fnb froze my account but they keep charging me monthly fees for an account i do not use, every month i am paying R822.03 and it has been 6 months which means have paid R4 932. i contacted private wealth and asked them to downgrade my account to a cheaper option like a gold account while the investigation is ongoing they said they cant do that while there is a hold on the account, i mean what would it cost fnb an extension call from one department to another to remove it for 1 minute and they downgrade,. i can go on and on about this. The reason i am reviewing fnb is not because i want them to remove the freeze on my account, that one they can keep for the rest of my life cause they know i did nothing wrong. But they must stop being a ***** they are investigating. they must either close the account altogether or downgrade it like i asked because by the look of things i will end up owing them thousands of rands which i wont pay.

From a client of 12 years