Coty PR & influencer Marketing assistant interview questions

2 interviews so far for a placement job starting in july, i had a screening interview in November where i filmed myself answering some questions. 2nd interview was mid Jan, 2 ladies from the department interviewed me. Pretty basic interview questions (tell me about yourself and how your experience relates to the position you applied for etc ) ive been offered a 2nd interview and need to prepare a case study for it, they said id have 7 days to prepare but offered me a date i am back at uni so cant attend. I asked to attend an earlier date but no response from HR yet.