Account on hold - Receipient has received refund and refusing to submit an affidavit.

I have been calling standard bank and going to the branch with no assistance On the 16th of July I received a payment on behalf of someone of R2700 for an item i posted selling online. The said person had not received their items due to them being ****** during the looting that happened in Durban therefore Aramex boxes were looted also including a few of my parcels. Upon waiting for a while while I explain to the client that I am recovering the funds of the ****** items and will be resending again as I suffered a great loss she reported my account to standard bank. I then spoke to her and we agreed that I will pay her R1350 on two different occasions and she will send an affidavit to standard bank she received half and will advise her bank Capitec to remove the block so I can send the remaining half as I had no other cash with me. After paying the amount to her account she refused to go and do the Affidavit and said she doesn’t care about the rest of her money she wants my account blocked forever. I have money tied up in my account that I need and it’s been months of calling and being told “your profile is blocked because of security questions I will ask my supervisor and he will unblock it” I have all the proof with me. I just need to know what I’m supposed to do. I’ve been emailing and no response. I’ve been going into the branch only to be given a phone to call the same number I can call when I’m home. Please assist me ASAP.