I got my visa yesterday but I want to defer this semester and go in december for jan semester...somebody told me if u get visa u have to go u can't defer a semester before joining..if I do so my visa will be invalid and i will have to apply again for visa..is this true? If not what is the procedure to defer a semester...whoever knows plzz let me know
Whoever told you this doesn't know what he is talking about. The information that you have been provided is not true.
As you are advised by the other member, ask your university for deferral and get the updated LOA. Enter Canada before the start of your semester with the required documents such as LOI, Updated LOA, Valid Visa and Passport, proof of funds etc.