Screwing you on your bills

I tried to pay my bill on time as I always do, but THE NIGHT OF THE DUE DATE, they added some charges from a swipe I made THAT DAY, and billed these to the current statement, even though I had already paid it off! Now my payment is late and they are charging me interest. This isn't even the first time this has happened! Worst fucking Credit Card program in America! Avoid them at all costs, you will not regret it.