Instant pay did not go through and I have been charged fees

I have been trying to sort out my payment issue for the past 3 days with no success, I made R11 000 instant payment from my Nedbank account Saturday to a Standard bank account, and the money is not there. Nedbank has even charged for the instant pay fees but the funds did not go through to recipient account. I have talked to 6 different agents saying they'll escalate the matter and sending them statements from the recipient account to show that the money did not reach the account even though the account number input was correct. I have now acquired more charges because of this and the recipient bank can't do the trace of funds since the money did not reach the account and the Nedbank branch couldn't help me and said i should call the Nedbank customer care line, whom I've been calling and have given me no update on the matter. This is so frustrating! Why is it difficult and taking so long to trace funds which came from your own account? R11 000 can't just dissappear just like that