Zero service from FNB

I have been struggeling to have an issue sorted out with FNB and the atturneys they used and they just keep ghosting me. Told me I would have feedback in two bussiness days just to send me an email stating the complaint has been closed in said two bussiness days with no feedback or resolution. I have been to the branch closest to me, no help there. I get told to send emails and no one assists or even worse, they just ghost me. I have settled my debt with them 6 months ago and overpaid as confiremed by the atturneys. To this day I still can not get a paid-up letter from them or my overpaid funds transferred back to me. I have been banking with FNB for many years now and it is sad that this is the thank you I get, zero service from them.