ABSA internet banking glitch lost my R15,000 payment

Made an immediate payment from my FNB business account to my ABSA personal account on 21st of February, 20h10. ABSA had an internet banking issue. Money is missing, not a small amount. FNB shows it has cleared and been paid out successfully, ABSA keeps telling me to contact FNB.

If FNB doesn't have my immediate payment anymore and ABSA doesn't have it after their internet banking 'glitch' at the time I made payment, then where is it?

Note: Account number was correct, checked it with both banks.