ICQ Lost?

I've had ICQ for a looooong time. Back in the day, it was owned by a company in Israel. My number is so low, it's only six digits 364308. I even met my wife through ICQ. The problem today is that I don't know my password, and any attempt to use the forgot password feature on the site says - nope, you can't do it with your account. So now I'm at a loss. How the heck to I get my account back?