I have by mistake entered the wrong pin code for my school address in 3 colleges and now I cannot change it back, please help me.
Dear student, you can try for option edit if it is online form or if not possible you can email the college for this issue and can contact college telephonenicaly or can go to college if it is serious problem. You can check college guidelines if something is filled wrong then what will be the procedure to correct it as it varies from college to college.
Hope your problem will be solved!!!