Slow ING

I had some leftover money the other day so I transferred it into ING. I then received an unexpected bill, so needed that money back. However, despite it being a week since I transferred the original sum into ING, it still hasn't shown up in there, which means I can't transfer it back out to pay my bill.

I have never had an issue with ING before and this isn't a major one, however, I am a little frustrated it has taken so long.