If your visa is approved but you decide not to study, you must inform the relevant immigration authorities and your educational institution immediately. Failing to do so may violate visa conditions, potentially affecting future applications.
You may need to formally withdraw or defer your enrollment, depending on the institution’s policies. Overstaying or misusing a student visa can lead to penalties, including deportation or bans. Consult the embassy or immigration office for guidance on canceling or adjusting your visa status to avoid legal complications.