Incorrect transfer that cannot be solved by FNB and Wesbank

I just made an Incorrect transfer from my Cheque Account to my Wesbank Loan Account. Now I needed to transfer back that money but I cannot. I first contacted the FNB Loans account and they could not help me they told me this must be done by Wesbank. They transferred me to Wesbank but I got cut off. I Went online and found the Wesbank contact details and I contacted them and explained my situation, after transferring me four times between various departments I was finally transferred to the Client Services department where I was holding for more that 17 Minutes before I got cut off.

I am now running out of options as there seems to be no one who can help me to transfer my own money back to my Cheque account.

I don't understand this service between FNB and Wesbank, who can help me get my money back?

I have run out of airtime and patience