THIS REALLY IS ONLY R400.00 !!!!!

I when to the FNB Auto-bank on the 5th of December and withdrew R1000.00. the bank fortunately only gave me R600.00. I immediately phoned an after hours nr and the advised me to contact the branch on Monday as only the branches works with the auto banks. I, on Monday, phone and they told me that it is fine, they will send me a form to complete. I did just that and mailed it back to them. after a few days, I phone FNB to ask what is the hold up ?? and they informed me that the form I did was wrong. I then threw my toys out of the cot and eventually the lady said o.k. not to worry, she will sort things out for me. I received a mail from this specific employee on the 17th of December asking \is the money back in your account"I rep**** NO as there was nothing paid back to me. this is now the 6th of January and STILL no R400.00. surely for FNB R400.00 is small change but for me"