Sir I am not getting any questions correct of quants after studying it completely from your course what to do now.

Tbh, same thing happened to me, but then I revised the topics from somewhere else, and I'm doing better than before. You can try doing the same.

if i can ask how many question have you solved from study room per topic?

Let's try again what else we can do bro. Maybe it will get better just solve more questions and more mocks. Btw I am also in similar position