FNB/RMB Bad Service delivery: Internal payment take long than expected!

FNB/RMB has its own way of letting its clients down. How can an internal payment take 2 days to clear, HOW? I made a payment to an FNB business account from my personal FNB account on the 2nd of February 2019 and up to now the funds have not cleared. On the 4th of Feb I visited the branch to inquire since I don't rely on their call centres. I was informed that the funds will be cleared by 1300hrs on the 4th. The lame excuse I was given was that it was monthend. I just kept my cool. Now, how can one do business with such services? This is unacceptable!