Missed summer Make up registration

I wanna know that mene apna SLCM ka password reset nahi kiya tha toh due to that 2days mene registration nahi ki ab make up registration k option me no event araha hai what to do now??how do I register myself for make up registration

PS- Like I have two backlogs in my 1st sem if I don't give my odd exam this time Will I be able to sit in my 3rd semester, or not? Can I take the backlogs next year?