Hey,

Firstly mention the name of exam whose admission or counselling or any else fee, you want to get refund of. As not all the exams follow the refund policy.In case , the exam or college you have applied to,  has a refund policy , write them a mail and explain your reason for withdrawal and ask them for your money refund. Also,  there are chances of finding a fee refund tab on the official website or your portal. But i can not tell ypu anything in particular,  without knowing the name of exam. So,  please mention it in comments so that i can help you at my best.

Thankyou