Cipher stated the truth "You can get better, you need to start practicing correctly."
Practice doesn't make perfect. Perfect practice makes perfect. And if you're not getting better then there is obviously a reason for it.
I don't believe I would be spending any more money with an instructor who isn't making me better. I mean, why would you? The whole reason for getting "professional" help was to get better, correct?
Find a new pro, devote more time to perfect practice, and you will see your scores slowly dropping!