It is not mandatory to have a soft copy of your admit card. It is only for your future reference just in case you lose the hard copy. Please check the spam folder of your Registered Email Id. If it is not there, just make sure to take 4-5 more copies of your admit card. The admit card will probably have a 4 page pdf. Page 1 will have Exam centre details and self declaration form. Page 2 will  have Important exam Instructions to the Candidates. Page 3 and 4 will have Advisory for Candidates.