********** FNB atms

I have a business account with Fnb for the past 6 years and Im disappointed with their service. I went to phoenix plaza atm to withdraw R8000 to buy stock for my days business. I withdrew R4000 succesfully as that was the maximum amount i could withdraw. The 2nd time i put my card in and selected R4000, the atm gave my card first and the atm said preparing cash and nothing happened it like froze. Next moment the slip comes out and my R4000 was deducted yet no money came out. They screen suddenly said out of service. I went in the bank to query and they made me sign a form. I was told that i must wait 5 to 7 working days to get paid back. This is ridiculous because what if it was a persons last money and they had to buy food. If they dont refund my money in the next couple days then i will take my business account and personal account from fnb to nedbank. I have vehicle finance and credit cards with nedbank and their service is 100%. Catch a wakeup FNB! Just a month ago the FNB atm gave me R200 short but i let it go due to limited time but this is too much now. FNB is wasting my time.