How Standard Bank International Banking *****s money (legally)

I am an overseas consultant, paid in USD by my HO in Israel. Over a period of more than 18 months I have a monthly tug of war with the international banking of standard bank. It is the same thing every single month, my money arrives, lies around for a couple of hours, sometimes days. When they eventually wake up and credit my account the exchange rate has moved (mostly not in my favour). Last week Friday was another case in point... this time I tracked when it arrived at the bank to the time it was credited to my account (it was only credited after three phone calls to them over a period of an hour, to find out why the delay). This time the delay cost me over R2000.