Primark Sales Assistants interview questions

I applied online the next day got an email to pick a date for an interview. I went to the Primark on Oxford Street, and it was really busy at the time I went (it always is anyway) then I was to wait in the room for about 5 mins. the interview was easy, the manager seemed really nice and smiley. She asked the same generic questions and I thought I answered them quiet ok. I didn't really get a chance to show of my personality maybe thats why I didn't get an offer. But its Primark so I would I don't see why they would care.