Dear student,

Yes, you can leave the college, you need to contact the authorities and carry out the procedure to leave the college after which you can join ahri chaitanya and prepare for jee to get into iit's/nit's/iiit/gfti. Make sure you take back all your certificates. A student has the rights to take admission in a college that he/she wants to, no college can stop you from leaving their college, so go ahead and all the best for your preparation.