It is possible to make a $500B payment on the debt AND have the annual debt for that year increase. Your myopic focus on the debt as an "annual" only measurement does not mean there were never any reductions in the debt.
So you’re claming that every time a T-bill matures and rolls-over, that since the old one was paid off that’s a reduction in debt?
You probably also think you can make yourself rich by taking money out of one pocket and putting it into the other.