Krisflyer - another complexity

I recceived a statement from SIA showing that I have x Krisflyer miles and y Elite miles. I searched their website for the difference between these two types of miles, but I could not find it. I search for the telephone number to call, and I could not find it. This is another example of the complexity that we have to deal with. There was only one past occasion that I redeemed my air miles (previously, I allowed them to expire) and I had a lot of trouble navigating their complex website. I still have trouble now, and need to call their hotline for assistance.