Hi there. I've recently just passed the skills test and know what hours and hours of circuits feels like! But as others have said there does seem to be something going awry.
It is time to make an appointment with the FI and CFI and discuss your progress and find out what the key issues are.
Bear in mind that some schools won't let you solo unless you have the air law exam passed.
The school I learnt to fly at left the exams completely down to me to manage, when I had studied and felt comfortable I took the exam. Simple. For the record I solo'd at 12hrs.
Also by the time I had about 4 hrs in the circuit I asked to go and do some GH and a bit of basic Nav when I went back to the circuit I managed 3 unaided circuits and to my surprise the FI jumped out and let me solo. Maybe you could try that to take the pressure off for a while?
I think you need to show some initiative and ask them what's going on for your own sanity if nothing else!
Good luck!