FNB payment

I made an immediate payment from my standard bank account to fnb and was told the account has been closed, my funds has not reversed to my standard bank account..I have logged two request with at standard bank, they keep saying the funds is with FNB and fnb will not assist as I am not an account holder, I then got the account holder of the FNB account to go to FNB however FNB keeps saying the fund is not with them, Can i please get assistant with sorting this out.