What is the procedure to re-apply for student visa in case it gets rejected? Do I need to pay the fees again? what other factor should I keep in mind before reapplying? After how many days of rejection, can I apply for a new visa?

If your application is refused, your options may be to either appeal that decision or make another application with further supporting evidence.

If the Appellant has been given an in-country right of appeal, they will usually need to lodge their appeal with the First-tier Tribunal within 14 days of the Home Office decision.

Completing an application and submitting it online within 14 days of receiving the refusal letter and submitting the case summary Submitting the skeleton Argument and appeal bundle awaiting a response from Home Office to be admitted (or not) for a hearing.