I didn't apply online for admission through samarth portal on cotton university but I have an account of samarth, am I eligible for spot admission for current year?

If you did not apply online for admission through the Samarth portal during the regular application window, then merely having a Samarth account does not make you eligible for spot admission. You must have submitted an application for the desired course during the official application period through the designated portal (assamadmission.samarth.ac.in for UG). Cotton University explicitly states that all admissions are online only, and there is no provision for walk-in or direct campus admissions, even for spot rounds